Difference between revisions of "Language/Multiple-languages/Culture/Internet-resources-for-polyglots"
| Line 1,320: | Line 1,320: | ||
To convert dictionary text files into TSV format, see [https://polyglotclub.com/wiki/Language/Multiple-languages/Culture/How-to-make-a-TSV-file this article]. The files at “mouse-dictionary/data/rule/” will need to be edited as well. | To convert dictionary text files into TSV format, see [https://polyglotclub.com/wiki/Language/Multiple-languages/Culture/How-to-make-a-TSV-file this article]. The files at “mouse-dictionary/data/rule/” will need to be edited as well. | ||
<hr><big><big> https:// | <hr><big><big> https://github.com/farfromrefug/OSS-Dict </big></big> | ||
Offline dictionary. It is open-source. | |||
<hr><big><big> https://github.com/rdoeffinger/Dictionary </big></big> | <hr><big><big> https://github.com/rdoeffinger/Dictionary </big></big> | ||
Revision as of 15:58, 6 April 2025
Hello polyglots, 😀
Polyglots are individuals who are able to speak multiple languages fluently. With the rise of the internet and technology, there are now numerous online free resources and tools available for polyglots to improve their language skills and connect with other language enthusiasts. This article aims to provide an overview of the most useful internet resources for polyglots, including language learning websites, forums, and social media communities. Whether you are a beginner or a seasoned polyglot, these resources can help you take your language skills to the next level and further your language journey.
- Links with “!!!!” are the most important resources for you if you don't know English well;
- Links with “!!” has low English skill requirement.
- For the condensed version of this article, go HERE.
This page has a child: Language/Multiple-languages/Culture/Internet-resources-for-learning-specific-languages.
Welcome to our lesson on "Multiple-languages Culture → Internet resources for polyglots"! 🌍 In this lesson, we will explore various online resources that can help you enhance your language learning journey and dive deeper into the fascinating world of polyglots. After completing this lesson, you can also check out other related pages, such as our Polyglot Club Team page, where you can learn more about the people behind the scenes who are passionate about multiple languages and cultures.
If you're interested in learning how to study languages more effectively, don't miss our guide on studying with a markup language, which can help you organize your language learning materials in a more structured way. And for those who love video games, we have a special treat for you! Discover how you can explore real-life locations through video games with multiple languages and cultures! 🎮
So, let's dive into the world of polyglots and explore the best internet resources to help you become a true language enthusiast!
-- Introduction --
Advices
This page is updated from time to time, not frequently, not regularly. “But how do I know what you have changed since the last time I come here?” Try this: hover your mouse over “Actions” in the upper right corner of this page, click on “history”, select the current and the version you saw last time, click on “Compare selected versions”.
It would be great if you pay a visit to every site on the list. Don't lose your curiosity.
If you want to do creative work to help others to learn languages and to know about cultures, please visit Language/Multiple-languages/Culture/Productivity-tools-for-polyglots.
It is not recommended to put some banner like “featured in Polyglot Club” on your website, because this list is dynamic.
It is highly recommended to have privacy protections on. There are resources on privacy:
Tips
Some programs require the use of command-line. There is an article about how to do it on Windows. If you want to customise the font in command-line on Windows, you can use ConEmu.
Some programs split words in a sentence with spaces. In this case, texts in Chinese, Japanese, Thai, Vietnamese and other languages need a word segmentation.
To customise the display of webpages, see Greasy Fork to find corresponding tools.
See if you are downloading the binary file or the source code. Unless its language doesn't require compilation, you would need to build the program on your own with the source code. Links to download binaries (built programs) are elsewhere like “Releases” or links in the README.MD file. If you see there are multiple links in “Releases”, select the link with your corresponding operating system, CPU architecture and other clues in its filename. The “amd64” and “x86_64” have minor differences and are usually considered the same when describing a binary. “md5”, “sha256”, “sha512”, etc. are checksum formats, which can be used to check the integrity of the downloaded file. You can use the open-source tool GtkHash to check the integrity of the files with the same name of the checksum files.
If you see SourceForge, you may simply click on the “Download” button. In some cases, the downloaded file is not what you want. Then you need to find it out in “Files”.
If you don't see an executable file in the program, then you may have to compile it and then run it, if the programming language of the program requires it. You may find details on the internet.
JavaScript and some other languages support running something with two programs: a server and a client. You need to start the server, then access the server with the client.
JavaScript programs often utilise Electron.js to have cross-platform support easily, which integrates a Chromium in every program and occupies a lot of resources.
Java relies on a virtual machine, which is an emulator of a computer system and requires some more system resources.
See if the program is updated recently. Outdated programs may be no longer reliable, because they may rely on something else, like another program or a webpage, which can become invalid with the change of time. It may also contain security loopholes that were not discovered at that time and discovered now.
Political activism can motivate people to cause unexpected damage, like node-ipc by RIAEvangelist on GitHub.
Resource Selection Criteria
To be listed on this page, resources should possess at least one of the following characteristics:
- be rich in FREE content (not just a trial or not fulfilling the need in the free part), and the free content is mostly accurate, and the free content is not all covered by other free ones;
- be made with a unique, good idea;
- has no better alternatives.
Resources possessing the following characteristics will be given disadvantage:
- propagate specific political or religious ideas without possibility of discussion.
Resources with the following features will be given a little priority:
- available offline;
- available on multiple platforms;
- multilingual user interface;
- lightweight (including “written in C”);
- open source;
- privacy-friendly (including “registration not required”).
Blue Light Filter & Dark Mode
!! https://codeberg.org/fusco/gummy
Filter for Linux. It is open-source.
!! https://github.com/LibreShift/red-moon/
Filter for Android. It is open-source.
!! https://codeberg.org/ltguillaume/redshift-tray
Filter for Windows. It is open-source.
!! https://codeberg.org/sanshiro/EyeCareWindow
Coloured window with mouse passthrough. It is open-source.
Dark mode for web browsers. It is open-source.
Reminder
Rest reminder. It can lock your keyboard and mouse buttons when it is time. It is open-source.
!! https://github.com/AllanChain/sane-break
Reminder with notice in advance. It is open-source.
!! https://gitlab.com/axet/android-hourly-reminder
Repeating timer. It alarms every hour or even minute. This reminds you how a minute passes by. It is open-source.
Break down a period of time to equal slices on Android. It is open-source.
!! https://github.com/mattvchandler/ProgressBars
Progress bars on Android. It is open-source.
!! https://github.com/thetwom/toc2
Metronome on Android. It is open-source.
!! https://www.antcom.de/gtick/
Metronome on Linux. It is open-source.
!! https://sourceforge.net/projects/openmetronome/
Metronome on Windows. It is open-source.
Work-Break Timer
!! https://github.com/vjousse/pomodorolm
Simple work-break timer on desktop. It is open-source.
!! https://github.com/ayoisaiah/focus
Work-break timer in command-line. It is open-source.
!! https://github.com/adrcotfas/Goodtime
Work-break timer on Android. It is open-source.
Activity Tracker
Track your own desktop activity. It is open-source.
!! https://github.com/rybak/resoday
Habit calendar on desktop. It is open-source.
!! https://codeberg.org/fynngodau/usageDirect
It shows your app usage on Android. It is open-source.
!! https://codito.github.io/habito/
Habit tracker in command-line. It is open-source.
!! https://github.com/SamAmco/track-and-graph
Habit tracker with graphs on Android. It is open-source.
!! https://github.com/Razeeman/Android-SimpleTimeTracker
Timer for activities on Android. It is open-source.
!! https://github.com/iSoron/uhabits
Simple habit tracker on Android. It is open-source.
!! https://gottcode.org/kapow/
Timer for activities on desktop. It can also generate a report. It is open-source.
!! https://github.com/appstome/timetome-app
Timer for activities on Android. It is open-source.
Its timer doesn't stop, so if you would like to do anything untracked, you need to select “other” and that category is tracked as well.
!! https://github.com/Glitchy-Tozier/githo
Form a habit step by step on Android. It is open-source.
!! https://github.com/Destaq/language-learning-dashboard
Dashboard for language learning, requiring some programming knowledge. It is open-source.
Self-Control Helper
Firewall for blocking Internet traffic for Desktop. It is open-source.
!! https://github.com/anfragment/zen
Internet traffic filter list on desktop. It is open-source.
Firewall for blocking Internet traffic on Android. It is open-source.
!! https://launchpad.net/timekpr-next
Limits the using times with a schedule for Linux. It is open-source.
!! https://www.proginosko.com/leechblock/
Browser add-ons for blocking websites. It is open-source.
!! https://selfcontrolapp.com/
Block websites for Mac. It is open-source.
Limit your app using time for Android. It is open-source.
!! https://detoxdroid.flx-apps.com/
Some other measures to help you on Android. Need to use a PC to enable developer mode. It is open-source.
It can be downloaded from F-droid.
!! https://github.com/sweakpl/unlock-master
Limit your mobile phone usage. It is open-source.
It can be downloaded from IzzyOnDroid.
Brain Training
Notice: Whether brain training works or not is still controversial. Some side effects may emerge if not following the instructions, e.g. “do not memorise steps in groups in n-back”. If you don't believe it works, please skip this section.
https://wiki.gnome.org/action/show/Apps/gbrainy
Mini-games. It is open-source.
http://brainworkshop.sourceforge.net/
Dual n-back. It is open-source.
Its latest version 4.8.7 is not available on the website, but on the SourceForge page.
https://github.com/vivekthazhathattil/dekadico
Memory trainer with numbers. It is open-source.
Concentration
!! https://app.3daimtrainer.com/quick-play
Aim trainer in 3 dimentions.
Aim trainer in 2 dimensions.
Workout
!! https://github.com/oliexdev/openWorkout
Workout assistant for Android with animations or videos. It is open-source.
Eating
https://codeberg.org/epinez/Energize/
Nutrition tracker for Android. It is open-source.
https://world.openfoodfacts.org/
Information about food nutrition.
Relaxation & Meditation
!! https://www.freesoundslibrary.com/
It has more than 200 ambient sounds for download. Turn loop on and enjoy.
!! https://github.com/rafaelmardojai/blanket
Play multiple audio files simultaneously on Linux. It is open-source.
!! https://github.com/CliffracerMerchant/SoundAura
Play multiple audio files simultaneously on Android. It is open-source.
!! https://github.com/yuttadhammo/BodhiTimer
Meditation timer. It is open-source.
!! https://github.com/Mr-Kumar-Abhishek/brain-beats
Binaural beats and more for desktop. It is open-source.
!! https://gitlab.com/axet/android-binaural-beats
Binaural beats for Android. It is open-source.
!! https://sites.google.com/view/jithware
Meditation helper with breath control for Android. It is open-source.
This one supports a lot of languages in Latin script, but it means to learn typing again. It is worth it. You may have noticed that “Kolemak” is even better than Colemak. How to modify keyboards will be discussed below.
Note that the download link on the home page is “Caps Lock Unchanged”. The idea of replacing Caps Lock with Backspace is great because of its convenience to press Backspace, but having it unchanged is generally better because it's punitive to press Backspace, urging you to make fewer misspellings.
There is a flaw of no “„” or “‚”. You can replace “÷” and “×” with them. Also, the positions of single and double quotation marks only benefit British people for not pressing Shift. You can exchange their positions, too.
There is a modified version and local variants.
Based on French, giving consideration to European languages. But if you don't type French much, it might be not ideal.
No English translation for this site, but it doesn't matter, because this keyboard is generally pre-installed in common operating systems. You just need to find it in the “French” section of keyboard settings.
https://forum.colemak.com/topic/519-rulemak-russian-colemak-layout/
Variant of Colemak for typing Cyrillic. It is available as source code. It is pre-installed on Linux, but it requires some effort as mentioned in the “Colemak” section to make sure it appears in the files. “Greek (Colemak)” is also available.
For Windows, Portable Keyboard Layout is required. Or you can use that keyboard creator to do it manually.
!! https://play.google.com/store/apps/details?id=kl.ime.oh
It is lightweight and supports many languages, with many keyboard layouts. But it has problems, such as poor Japanese support.
!! https://github.com/Helium314/HeliBoard
Keyboard on Android with initial CJKV support. It is open-source.
Keyboard on Android with CJKV support in its beta version. It is open-source.
Typing
!! https://github.com/max-niederman/ttyper
Typing practice in command-line with detailed statistics. It is open-source.
!! https://github.com/bloznelis/typioca
Typing practice in command-line with a time limit. It is open-source.
!! https://github.com/Mithil467/mitype
See the replay of your typing session. It is open-source.
!! https://github.com/plu5/retype
Type books in EPUB format. It is open-source.
Shortcut
!! https://en.wikipedia.org/wiki/Table_of_keyboard_shortcuts
Keyboard shortcuts in general.
Keyboard shortcuts for specific programs. Add “?pdfOptions=True” to the end of address to download its PDF.
Cheat Sheet
Cheat sheets for programs.
!! https://github.com/gnebbia/kb
Knowledge base of commands in command-line. It is open-source.
File Management
!! https://github.com/sxyazi/yazi
File manager in command-line. It is open-source.
!! https://github.com/sharkdp/fd
Find local files in command-line. It is open-source.
!! https://github.com/phiresky/ripgrep-all
Find texts in local files in command-line. It is open-source.
Text Editor
Text editor with features like replacing text in multiple files. It is open-source.
Text editor with plugins. Input methods like Fcitx not supported yet. It is open-source.
!! https://github.com/gsantner/markor
Text editor with markdown and todo.txt supports on Android. It even has a “speed read” function. It is open-source.
!! https://micro-editor.github.io/
Simple text editor in command-line. It is open-source.
Text editor in command-line with modes and plugins. It is open-source.
A configuration like LazyVim is recommended.
https://github.com/helix-editor/helix
Text editor in command-line with modes. It is open-source.
Spreadsheet
!! https://www.marktyler.org/ced/
Minimal spreadsheet program. It is open-source.
!! https://github.com/wfxr/csview
Spreadsheet viewer in command-line. It is open-source.
!! https://github.com/jqnatividad/qsv
Spreadsheet tool in command-line. It is open-source.
Comprehensive Tool
Text and whiteboard. It is open-source.
!! https://super-productivity.com/
Good-looking schedule with a pomodoro timer. It is open-source.
Knowledge management in command-line. It is open-source.
Journal, note, todo with tags on Android. It is open-source.
!! https://github.com/mhss1/MyBrain
All-in-One productivity on Android. It is open-source.
Task Planner & To-Do-List
!! https://www.abstractspoon.com/
Versatile task planner on desktop. It is open-source.
Simple task planner on desktop. It is open-source.
!! https://github.com/v1tzor/TimePlanner
Task planner on Android. It is open-source.
Task planner in command-line. It is open-source.
https://github.com/anufrievroman/calcure
Simple task planner in command-line. It is open-source.
!! https://eck.cologne/peafactory/en/html/calendar_pea.html
Task calendar with encryption on Android. It is open-source.
!! https://github.com/Etar-Group/Etar-Calendar
Task calendar on Android. It is open-source.
!! https://github.com/Sztorm/NoteCalendar
Note calendar. It is open-source.
!! https://github.com/ransome1/sleek
To-do-list based on todo.txt. It is open-source.
!! https://github.com/kraanzu/dooit
To-do-list in command-line with TUI. It is open-source.
!! https://github.com/Zaloog/kanban-python
Kanban in command-line. It is open-source.
To-do-list on Android. It is open-source.
https://github.com/ribeirompl/144_blocks
Plan a day in 144 blocks. It is open-source.
Notebook
Knowledge manager with graphic view of nodes and flashcards. It has plugins including adding Anki Flashcards. It is open-source.
Notes with end-to-end encryption and syncronisation. It is open-source.
Notes with hierarchy and tags, and can be exported to CSV files. It is open-source.
!! https://github.com/TriliumNext/Notes
Advanced notebook with hierarchy, text formatting, link map, synchronization and encryption. Good for working. It is open-source.
!! https://github.com/pbek/QOwnNotes
Notes and Todos. It is open-source.
!! https://www.giuspen.com/cherrytree/
Hierarchical notebook with encryption. It is open-source.
!! https://eck.cologne/peafactory/en/html/notebook_pea.html
Write RTF files with encryption. It is open-source.
!! https://quillpad.github.io/
Simple note-taking app for Android. It is open-source.
!! https://github.com/YangDai2003/OpenNote-Compose
Note-taking app for Android with Markdown, LaTeX and Mermaid support. It is open-source.
Encrypted notes on Android. It is open-source.
Notes in command-line. It is open-source.
!! https://github.com/AmmarAbouZor/tui-journal
Journal in command-line. It is open-source.
Notebook for Emacs, Neovim and other text editors. It is open-source.
!! https://gitlab.com/ferreum/pto
Plain Text that can be activated at the lock-screen on Android. It is open-source.
!! https://postkevone.github.io/tiddlyresearch/
Notebook for Tiddly Wiki. It is open-source.
Handwriting Notebook
!! https://xournalpp.github.io/
Handwritten note editor. It is open-source.
!! https://saber.adil.hanney.org/
Note with handwriting. It is open-source.
Handwriting program. It is open-source.
Audio Notebook
!! https://certified84.github.io/AudioNote/
Audio tonebook on Andriod. It is open-source.
Whiteboard
Online whiteboard. It is open-source.
Online whiteboard. It is open-source.
Wiki
https://www.dokuwiki.org/dokuwiki
Wiki with many add-ons. It is open-source.
It requires setting up a server.
It has an open-source viewer for Android.
Non-linear Wiki on web with HTML files. It is open-source.
Not ideal if the file is large. If the file is large, that means each time you modify and save it, it writes another large file.
It has an open-source viewer for Android.
Simple wiki. It is open-source.
Diary
Diary for desktop. It is open-source.
!! https://billthefarmer.github.io/diary/
Diary for Android. It is open-source.
Diagram
Diagrams. It is open-source.
Timeline
!! http://thetimelineproj.sourceforge.net/
Timeline. It is open-source.
Mind Map
!! https://www.insilmaril.de/vym/
Mind map with not many and not few features. It is open-source.
!! https://github.com/juzzlin/Heimer
Simple and intuitive mind map. It is open-source.
Markdown mind map with VSCodium / VS Code support. It is open-source.
Mind map for Tiddly Wiki. It is open-source.
Hierarchical Spreadsheet
!! https://strlen.com/treesheets/
It combines mind map, spreadsheet and other forms of data. It is open-source.
Graph
!! https://foambubble.github.io/
Graph for VSCodium and VSCode. It is open-source.
Media Management
File tagging. It is open-source.
E-Book manager. It is open-source.
The main drawback is it has to keep a copy of your book in a central directory, which will cause duplication if you also keep the book elsewhere.
!! https://github.com/mateusz-bak/openreads-android
E-Book tracker on Android. It is open-source.
Web Table Extraction
!! https://www.libreoffice.org/
Office suite with spreadsheet that can capture web tables. It is open-source.
!! https://merribithouse.net/copytables/
Capture tables from webpages for Chrome and Safari. It is open-source.
!! https://github.com/nirantak/copytables
Fork of Copytables for Firefox. It is open-source.
Logic
https://forallx.openlogicproject.org/
Book edited by different groups of people. Its work is under a public license.
https://www.logicmatters.net/tyl/
Book, conditioned distribution allowed.
Artificial Intelligence
!!!! https://www.deepseek.com/
One of the top open AI models online. It is open-source.
One of the top open AI models online. It is open-source.
!!!! https://gpt4all.io/
AI application with several models available for offline use. It is open-source.
Client for online and self-host AI services. It is open-source.
International Phonetic Alphabet
!! https://www.internationalphoneticassociation.org/
The site of the maker. The full IPA chart can be downloaded here. There is also a link to an interactive IPA chart.
!! https://easypronunciation.com/en/ipa-phonetic-transcription-converters
IPA and romanization transcriptions. Very detailed, but there is a limitation for each hour. Its “More Tools” is also noteworthy.
https://github.com/dmort27/epitran/
Transcription to IPA. It is open-source. It won't help if you don't know Python.
It only supports words, as is discussed. Somebody can develop a tool for sound change.
Pronunciation
Pronunciation data from Wikimedia Commons. Its work is under a public license.
!!!! https://forvo.com/
Dictionary of pronunciation.
Phonological data. Its work is under a public license.
https://fsi-languages.yojik.eu/
Mainly courses of Foreign Service Institute, Defense Language Institute, Peace-Corps. FSI is initially aimed at middle-aged officials, so maybe not everyone likes it. Its work is partly in public domain.
https://www.coursera.org/browse/language-learning/
Some super cool courses. This is suggested by RomDasha.
!!!! https://www.lingolia.com/
A little site with useful basic courses of 5 languages with good design.
https://en.wikibooks.org/wiki/Subject:Languages
Books are mostly incomplete and in lack of update, but some are nearly completed or completed, not bad.
https://ikindalikelanguages.com/
Introductions to languages.
Speaking
Pronunciation from videos, with a large subtitle frame.
It is better to be used together with the Chromium or Chrome extension Separate Window.
Submit the recording and wait for the response. Supported languages are not many.
!! https://ivypanda.com/tongue-twisters
Try not to hurt yourself when practising.
It covers an older site and has improved a lot. There's no copyright affair involved because such a list is not a “creative work”.
You may want to ask if this page is protected by copyright. All my comments are protected, the list of links like the one in that brief version is not.
Flashcard
!!!! https://apps.ankiweb.net/
Offline flashcard platform. You can find its manual at “Docs” on the website. Content can be rendered in HTML and CSS. It is open-source.
Unfortunately, not free on iOS.
Related resources:
| Shared Decks | Add-ons | External Programs |
| Beginner Tutorial | TSV Creation | Web Scrapping | Markup Studying |
There is also a section of an article on flashcards.
There is an infamous issue of it: if you add or delete fields in a note type, you have to upload all your data when syncronising. Also expect Bazel, which it utilises to cause troubles.
!! https://mnemosyne-proj.org/
Flashcards with basic functions. It is open-source.
!! https://github.com/abeleinin/goki
Flashcards in command-line through TSV or CSV files with ChatGPT support. It is open-source.
!! https://github.com/proycon/vocage
Minimalistic flashcards in command-line through TSV files. It is open-source.
!! https://github.com/FilippVolodin/ReeePlayer
Flashcard with video clips. It is open-source.
!! https://github.com/alyssaxuu/carden
Chromium/Chrome addon. It is open-source.
!! https://github.com/tema6120/ForgetMeNot
Flashcard program for Android. More advanced than AnkiDroid in many aspects, including necessary instructions. You can even set intervals for the spaced repetition. It is open-source.
!! https://github.com/rh-id/a-flash-deck
Flashcards with notification on Android. It is open-source.
Flashcard for Tiddly Wiki. It is open-source.
Presentation
!! https://codeberg.org/GrimPixel/Fountain
Presentation with TSV in command-line. It is open-source.
!! https://maaslalani.com/slides/
Presentation with Markdown in command-line. It is open-source.
Wallpaper
https://peterlevi.com/variety/
Wallpaper changer for Linux. It is open-source.
It has “quotes”, which can be used as the flashcard. An example is variety-german-words. To customise its code:
In “german_words.py”
- Search and find “data = ”, change its structure;
- Replace “reader(fin)” to “reader(file, delimiter="\t")” to support TSV;
In “words.csv”, change its content.
Danmaku
https://github.com/luyuhuang/DWords2
Shoot entries on the screen. It is open-source.
!!!! https://context.reverso.net/translation/
Among its products, the mobile version of Context seems to be the most helpful: learn and practise new words with example sentences.
!!!! https://babadum.com/
It's pretty good for educating young polyglots.
!!!! https://github.com/tkrajina/10000sentences
Sentences from Tatoeba to practice. It is aesthetically same with Anki (I mean copy-paste). It is open-source.
!!!! https://www.clozemaster.com/
Learn with cloze. It is effective, but sometimes it is just repeating the same point in different questions. Also, synonyms are not supported.
!! https://www.languageguide.org/
Some basic vocabulary.
Visual dictionary. No grammatical genders or pronunciation, suitable for reviewing.
A lot of languages has not been completed yet, without any notice. Also, look out for polyseme mistakes.
See the related phrases of a word. It is open-source.
https://en.wiktionary.org/wiki/Appendix:Swadesh_lists
Swadesh lists are basic vocabulary, initially for linguistic use. But it can be the starting point of vocabulary building for language learners as well.
!! https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists
Frequency lists. Make use of it with programs that help to memorise, such as Anki.
If you seriously want to learn a language, and there are no ready-made free flashcards reaching the native level, and you don't want to spend money, this may be the most effective way to memorise words.
!! https://github.com/frekwencja/most-common-words-multilingual
Word frequency of top 5000 words.
!! https://github.com/rspeer/wordfreq
Word frequency tool for Python. It is open-source.
Etymology
Etymology in European languages.
!! https://sourceforge.net/projects/scrabble/
Scrabble. It is open-source.
!! https://gottcode.org/tanglet/
Boggle. It is open-source.
!! https://gottcode.org/connectagram/
Connectagram. It is open-source.
!! https://gitlab.gnome.org/jrb/crosswords
Crossword on Linux. It is open-source.
!! https://github.com/lexica/lexica
Game of finding words on Android. It is open-source.
!! https://billthefarmer.github.io/gurgle/
A word game on Android. It is open-source.
!! https://billthefarmer.github.io/gridle/
A word game on Android. It is open-source.
!! https://github.com/Magoninho/word-search-puzzle-generator
Word search game on command-line. It is open-source.
To change the letters in the game, modify the list in “alphabet.py”.
!! https://gitlab.com/Hague/forkyz
Crosswords on Android. It is open-source.
!! https://github.com/devarshi16/HangMan
Hangman. It is open-source.
Its data is at “hangmanultimate/data.py”.
!! https://gemelo.org/grabagram/
Anagram on mobile. It is open-source. Code at its github repository.
Quiz
!! https://github.com/Yvee1/hascard
Quizzes in Markdown files in command-line. It is open-source.
!! https://github.com/ismet55555/exam-terminal
Quizzes in YAML files in command-line. It is open-source.
You may need to enter full-screen mode, otherwise the program won't work for not having enough space.
!! https://github.com/JeromeSchmied/crablit
Quizzes TSV or other files in command-line. It is open-source.
!! https://codeberg.org/GrimPixel/Quiz_Grid
Generate HTML tooltip quiz from TSV files. It is open-source.
Test
A few materials for beginners. Better treat it as your proficiency tests instead of learning materials because it's not much.
!! https://www.transparent.com/language-resources/tests.html
Test your proficiency.
There is only one set of test for each language. Don't search the meanings of the words you don't know if you want to take this test again later.
!! https://www.arealme.com/vocabulary-size-test/en/
For testing your vocabulary size.
There is only one set of test for each language. Don't search the meanings of the words you don't know if you want to take this test again later.
!! https://www.ezglot.com/vocabulary-test.php
Test your vocabulary size. It's faster and maybe not so accurate. The result is at an inconspicuous corner.
Reader
!! https://jakubmelka.github.io/
PDF reader and editor. It is open-source.
Lightweight PDF reader for desktops. It is open-source.
Type “man mupdf” in command-line to see its shortcuts.
!! https://www.sumatrapdfreader.org/
PDF reader for Windows. Dark mode and Annotation are available. It is open-source.
!! https://gitlab.com/mudlej_android/mj_pdf_reader
PDF reader for Android. It is open-source.
!! https://www.libreoffice.org/
Editor for many document formats. It is open-source.
!! https://johnfactotum.github.io/foliate/
Reader for Linux with features like layout and online translation. It is open-source.
Reader for Android. It is open-source.
Reader with a simple user interface for Android. It is open-source.
Read Wikipedia and some other sites offline. It is open-source.
RSS Tool
!! https://greasyfork.org/en/scripts/373252-rss-show-site-all-rss
User script for showing RSS feeds of a website. It is open-source.
RSS Client
Simple RSS feeder. It is open-source.
RSS feeder for Linux. It is open-source.
!! https://github.com/martinrotter/rssguard
RSS feeder for desktop. It is open-source.
RSS feeder in command-line. It is open-source.
!! https://github.com/readrops/Readrops
RSS feeder for Android. It is open-source.
RSS Feed
!! https://www.cyberseo.net/public-rss-feed-catalogue/
Catalogue of RSS feeds.
Image Viewer
!! https://github.com/nomacs/nomacs
Image viewer. It is open-source.
!! https://github.com/atanunq/viu
Image viewer in command-line. It is open-source.
Vocabulary Builder
!!!! https://github.com/jzohrab/lute-v3
Build vocabulary list by adding definitions to words on texts. It is open-source.
!!!! https://vocabhunter.github.io/
Find unfamiliar words in a document. Great for getting familiar with all words in a document before reading. Better to disable the filter. It is open-source.
!!!! https://github.com/FreeLanguageTools/vocabsieve
Analyse the sentence, find the vocabulary and create Anki flashcards. It is open-source.
!!!! https://github.com/geajack/Wordology
Browser add-on for building vocabulary. It is open-source.
Available for Chromium and Firefox.
!! https://github.com/xxyzz/WordDumb
Footnote creator for e-books. It is open-source.
https://codeberg.org/GrimPixel/Text_to_Wordlist
Turn a text into a wordlist and attach dictionary items on them with JSON files from kaikki.org. It is open-source.
The tutorial for it is at Language/Multiple-languages/Culture/Tutorial-of-Text-to-Wordlist.
Webpage Tool
!! https://piro.sakura.ne.jp/xul/_treestyletab.html.en
Arrange browser tabs in hierarchy. It is open source.
!! https://github.com/gildas-lormeau/SingleFile
Save the web page as a single file.
!! https://github.com/lapwat/papeer
Save webpages in different formats in command-line. It is open-source.
https://github.com/OlegWock/anori
Browser extension for customised new tab with Anki support. It is open-source.
https://github.com/zimocode/smartupGesturefy
Gestures for some Browsers. It is open-source.
Speed Reader
https://github.com/Darazaki/Spedread
Reading speed trainer for Linux. It is open-source.
!! https://github.com/pasky/speedread
Reading speed trainer. Perl is required. It is open-source.
!! https://github.com/nemanjan00/uniread
Speed reader with e-book support. It is open-source.
!! https://github.com/Quantum-mutnauQ/Fast_Reader_GTK
Speed reader for Linux. It is open-source.
!! https://comfortreader.rhizomaticdesign.net/
Streaming reader for Android. It is open-source.
!! https://github.com/FP22FD/auto-scroll-down-chrome-extension
Autoscrolling for Chromium/Chrome. Good for practising reading speed.
!! https://github.com/hisakaz0/AutoScrolling
Autoscrolling for Firefox. Good for practising reading speed. It is open-source.
Book Catalogue
https://github.com/tfonteyn/NeverTooManyBooks
Book catalogue on Android. It is open-source.
!! https://wikisource.org/wiki/Main_Page
Literature in public domain. They can be downloaded.
The largest collections of books in the public domain, mostly in English, though.
Android app for downloading books is available at Myne.
There is a book catalogue website with ever-changing domain names: LibGen, which contains a wider range of books. Make sure you don't see any strange link there. It is also available on Android.
Writing
It is not for learning languages, but for how to write and read. Its work is under a public license.
It is teaching about English, so something does not apply to some other languages.
https://owl.purdue.edu/owl/purdue_owl.html
Another online writing lab.
https://www.theologeek.ch/manuskript/
Tool for writing stuff. It is open-source.
https://github.com/Wavesonics/hammer-editor
Tool for writing on Android. It is open-source.
https://github.com/Wavesonics/hammer-editor
Corrector of minor typos. It is open-source.
!!!! https://www.wiktionary.org/
Practical, no need to switch dictionaries, translations in many languages are shown together.
there is a parser for its data. Extracted JSON data are also available.
!!!! https://www.wordreference.com/
It is really completed.
It is completed, with example sentences of high quality. You can even find uncommon words with meanings of common words.
!!!! https://bab.la/
It is completed for several languages.
Terminology dictionary of European Union. That is to say, what you search should be a term.
It supports a lot of languages, citing results from several corpora. It is somehow messy and in many cases inaccurate, but if the dictionaries listed above have no result about a word, this one may help.
!!!! https://xiaoyifang.github.io/goldendict-ng/
It supports online and offline dictionaries, based on GoldenDict. It is open-source.
You can search the word by selecting it and listen to Forvo pronunciation. You can also add dictionary websites.
!!!! https://crissium.github.io/SilverDict/
Web version of GoldenDict. It is open-source.
!!!! https://github.com/pnlpal/dictionaries
Browser add-on with clear results and can export to Anki decks. It is open-source.
!!!! https://mouse-dictionary.netlify.app/
Browser add-on for searching local dictionary files. It is open-source.
To convert dictionary text files into TSV format, see this article. The files at “mouse-dictionary/data/rule/” will need to be edited as well.
https://github.com/farfromrefug/OSS-Dict
Offline dictionary. It is open-source.
https://github.com/rdoeffinger/Dictionary
Offline Wiktionary with custom dictionary support on Android. Its search results are easy to read for robots like you. It is open-source.
Translation
Translator with multiple engine support. It is open-source.
https://www.soimort.org/translate-shell/
Command-line translator from different sources. It is open-source.
!! https://github.com/Bnyro/TranslateYou
Translator for Android. It is open-source.
Webpage translation with sentence dictionaries. It is open-source.
https://github.com/ttop32/MouseTooltipTranslator
Translator for Chromium and other Browsers with mouse hovering. It is open-source.
This extension sets AltGr key to translate.
Transliteration
!! https://codeberg.org/GrimPixel/Transliteration
Transliterator. It is at the beginning phase. It is open-source.
Conjugation
Conjugation and some declension.
Conjugation.
Gender
!! http://www.passion4teq.com/apps/
Apps for practising genders in 4 languages. You can also estimate how long you can practice until your battery goes empty.
Number
https://codeberg.org/GrimPixel/Numeration
Program to practise reading numbers. It is open-source.
In progress. It can see major progresses during school holidays. Introduction: Language/Multiple-languages/Vocabulary/Numeration-Tutorial.
!! https://www.languagesandnumbers.com/numbering-systems/
Rules of writing numbers, more concise than Wikipedia's entries.
Grammar Checker
It supports several languages, but works well on the few. It is open-source.
A video about the rule editor.
Audio Player
!! https://audacious-media-player.org/
Lightweight audio player for desktops. It is open-source.
!! https://www.strawberrymusicplayer.org/
Audio manager with many features. It is open-source.
!! https://quodlibet.readthedocs.io/
Simple audio manager. It is open-source.
!! https://codeberg.org/coleblvck/AntiiQ
Audio player for Android with speed control. It is open-source.
Audio player in command-line. It is open-source.
!!!! https://www.listeningpractice.org/
To practice listening. Voices are from volunteers and their qualities vary. It also has conjugation exercises. Its work is under public licenses.
If your browser doesn't play the audio automatically, then you need to grant the website the autoplay permission (next to the URL in Firefox).
!! https://globalstorybooks.net/
Stories in many languages translated from African Storybook. Its work is under a public license.
!! https://www.easy-languages.org/
Street interview videos with embedded subtitles. Real and fun.
The first time I watch a video, I was busy picking up the unknown words; the second time, I understood the sentences; the third time, I got an impression what kind of person the interviewee is.
Books read by volunteers. Its work is under public licenses.
!! https://lyricstraining.com/
Listen to songs and fill in the blanks of lyrics.
!! https://www.captionpop.com/
Watch videos and learn with subtitles.
Recordings. Its work is under a public license.
Recordings.
!! https://audio-lingua.ac-versailles.fr/
Listening materials with CEFRL levels. Its work is under public licenses.
It doesn't have transcripts, so speech-recognition is required.
Audio Tool
For audio edit, as well as training your pronunciation by comparing your own voice with the recording you were imitating. Fork of Audacity without potential privacy violation. It is open-source.
There are videos about checking your pronunciation, practising dialogues on your own, recording computer audio, labeling audio positions.
When you are playing games in the languages you are learning, it is often hard to focus on the voices and subtitles without failing your goals in the games. You can solve this problem by recording your gameplay with this program. It is open-source.
https://www.fon.hum.uva.nl/praat/
With this one, you can say you are “studying” pronunciation.
A little tutorial and a big playlist of various videos.
Text-to-Speech
If you don't know how to get the voices on Windows, you can see Language/Multiple-languages/Culture/How-to-use-SR-and-TTS-on-Windows.
!! https://github.com/ideasman42/nerd-dictation
TTS for Linux. It is open-source.
!!!! https://www.cwu.edu/student-life/student-support/central-access/resources/reader.php
A TTS program. It is open-source.
!!!! http://www.cross-plus-a.com/balabolka.htm
A TTS program with support other than SAPI 5.
!!!! https://github.com/Danesprite/tts-util-app
Text-to-Speech for Android. It is open-source.
Browser add-on. It is open-source.
!! https://github.com/suno-ai/bark
Text-to-Speech model. It is open-source.
!! https://codeberg.org/GrimPixel/Altering_TTS
A little program to generate audio files with altering TTS voices. It is open-source.
Configure everything in “setting.yaml”, have a look at “demo.tsv”. Change your command-line directory into the folder, run “python do.py“ to start.
Currently only Google Translate is supported. Offline engines on the way.
Speech Recognition
!!!! https://github.com/audapolis/audapolis
It transcribes audio. It is open-source.
!!!! https://www.speechtexter.com/
Turn audio into texts, powered by Google.
!!!! https://speech-to-text-demo.ng.bluemix.net/
Turn audio into texts, powered by IBM Watson.
Example Sentence
!!!! https://tatoeba.org/
Example sentences in many languages. Its work is under public licenses.
Don't forget to try searching in both directions. You can not only see the meaning of a sentence, but also try to translate a sentence into the language you are learning and see how you did.
If you want to translate, please translate sentences with audio first, because the translations may appear on sites which provide translations of audio.
!! https://deskell.sketchengine.co.uk/run.cgi/skell
Sketch from a large of text corpus.
Parallel Text
!!!! https://weblate.org/
Website for localisation. You can easily find parallel texts. It is open-source.
Subtitles in parallel. Sometimes the selected lines don't match because the sentences are not complete. Sometimes there are mistakes in subtitles.
Manuals. Some of them are in multiple languages. You can also find their German, Spanish, French domains at the bottom of the page.
Parse Tree
!! https://sourceforge.net/projects/treeform/
A tool to draw parse trees and have a better understanding of sentence structures. It is open-source.
!! https://ltc.sourceforge.io/
A different one to draw parse trees. It is open-source.
Text Memorization
!! https://codeberg.org/GrimPixel/Cloze_Test
Take cloze tests from texts, sentence by sentence. It is open-source.
The problem of spaCy and Python 3.12.4 is still to be fixed.
Phrasebook
!!!! https://www.funeasylearn.com/
It provides apps for both phrase and vocabulary.
It supports many languages, and it is detailed.
!! https://www.50languages.com/
Actually a few more than 50 languages. You can also have a test there.
Clock
Clock widget on Linux. It is open-source.
!! https://www.timeanddate.com/
It has not only the world clock for every city, but also many other features, such as calendars with festivals of most countries.
Weather
!! https://github.com/chubin/wttr.in
Weather program in command-line. It is open-source.
!! https://github.com/woheller69/omweather
Weather program for Android. It is open-source.
A lot of things about meteorology.
!! https://earth.nullschool.net/
Wind, weather, ocean conditions.
Air condition around the world.
Community
The most popular language learning community by now. It also pushes helpful articles written by teachers.
!! https://www.tolearnfree.com/free-educational-sites.php
The design of the webpages is old-fashioned, but it has a lot of content, including little tests.
Its French version has something more.
There are some rare features of it, such as Wiki lessons, Events. It adopts ISO 639-3, almost every language is included here.
Ask and answer with people around the world.
In some channels, questions are too many, answer rates are low. Try asking at Polyglot Club.
Ask in parallel text in case the respondent doesn't understand your formulation.
https://stackexchange.com/sites#culturerecreation
One of the most popular Q&A site.
Language Exchange
!! https://conversationexchange.com/
Find language exchange partners online.
Talking with people.
!! https://mylanguageexchange.com/
Free users can be contacted by those who have paid. Since they have paid, they are more likely to be serious learners.
Cloud office suit. Zero knowledge. It is open-source.
It's also great for language partners to do something together.
Chat
Chat client that supports multiple protocols through plug-ins. It is open-source.
XMPP client on desktop. It is open-source.
!! https://codeberg.org/iNPUTmice/Conversations
XMPP client on Android. It is open-source.
https://github.com/paulfariello/aparte
XMPP client in command-line. It is open-source.
!! https://github.com/SrainApp/srain
IRC client on desktop. It is open-source.
IRC client in command-line. It is open-source.
https://blogs.transparent.com/
There are periodically good contents being presented.
https://www.thoughtco.com/languages-4133094
Languages are fewer than Transparent's, and so do the update frequency. But its quality is still high.
Lyrics
!! https://www.musixmatch.com/
Lyrics and their translations.
!! https://lyricstranslate.com/
Lyrics and their translations.
Subtitle
Download subtitles form many websites.
!! https://www.opensubtitles.org/
One of the most popular subtitle sites. Subtitles in European languages are easier to find.
One of the most popular subtitle sites. Subtitles in English, Arabic, Persian, Indonesian are easier to find.
!! https://github.com/FunkyMuse/SubHub
Subtitle downloader on Android. It is open-source.
!! https://bonigarcia.github.io/dualsub/index.html
It can help to merge two subtitles. It may crash at the second time. It is open-source.
!! http://subs2srs.sourceforge.net/
Turn subtitles into flashcards. It is open-source.
!!!! https://github.com/garywill/multi-subs-yt
Display multiple subtitles on YouTube.
!! https://github.com/jdepoix/youtube-transcript-api
YouTube caption downloader in command-line. It is open-source.
News
!! http://www.abyznewslinks.com/
Links to news websites.
Some TV have shows for free, some of which even with subtitles.
!! https://gitlab.com/magnolia1234/bypass-paywalls-chrome-clean / https://gitlab.com/magnolia1234/bypass-paywalls-firefox-clean
Paywall bypasser for Chromium/Chrome, Firefox and other browsers. It is open-source.
Radio & Podcast
!! https://www.radio-browser.info/
A list of internet radio stations. You can find clients in “Apps”, some of which are open-source.
I prefer two stations: Public Domain Classical, Public Domain Jazz. Pleasing names.
!! https://github.com/zaps166/QMPlay2
Podcast player for desktop with RadioBrowser support. It is open-source.
https://github.com/gilcu3/hullcaster
Podcast client in command-line. It is open-source.
!! https://github.com/XilinJia/Podcini
Podcast player with search engine for Android. It is open-source.
Charts of podcasts.
!! https://www.listennotes.com/
Search Engine of podcasts.
Live & Video
Video player with fast response. It is open-source.
It is a frontend of MPlayer and can display two subtitles. It is open-source.
What a good name of this program.
!! https://github.com/iptv-org/iptv
Database of IPTV stream addresses. It is under a public license.
!! https://github.com/yuki-iptv/yuki-iptv
IPTV player on desktop. It is open-source.
!! https://brunochanrio.github.io/DangoPlayer/
IPTV player on Android. It is open-source.
The most complete list of worldwide online TV channels.
Many links are dead, but the live stream is still available somewhere else in many of these sites.
!! https://www.downthemall.org/
Link and image downloader. It is open-source.
!! https://github.com/yt-dlp/yt-dlp
Video downloader in command-line. It is open-source.
Popular YouTube channels, in English.
It can find similar YouTube channels.
Language Information
It provides information about basic knowledge of many languages. Many “Alphabet and Pronunciation” lessons on this site are from there.
Information of languages of the world. Not only languages, but also many varieties. It is open-source. Its work is under a public license.
Information of scripts. Its work is under a public license.
https://www.muturzikin.com/countries.htm
Linguistic maps.
General knowledge about European languages.
Codes for every language and is still being updated. You can find the whole table.
General Knowledge
A comprehensive encyclopedia.
Educational Resources
Educational resources search engine. Its contents are under public licenses.
https://oasis.geneseo.edu/index.php
Educational resources. Its contents are under public licenses.
Map
!! https://www.openstreetmap.org/
Another map site. You can even download them. It is open-source.
There is a video about its modification with Inkscape.
Alternative to Google Earth. It is open-source.
Offline maps for mobile with OpenStreetMap data. It is open-source.
Downloadable maps. It even includes cities. I don't expect them to be up-to-date.
National Symbol
!! https://en.wikipedia.org/wiki/Lists_of_national_symbols
Lists of national symbols.
Culture & Travel
https://ehrafworldcultures.yale.edu/
Introductions to cultures.
Introduction of the city and many details of countries. It is open-source.
The most important page for travelers is this.
Its information is old. There are details of peoples and countries.
Encyclopedia for Sid Meier's Civilization VI. It even has multiple languages, so it's great for reading as well.
https://culturalatlas.sbs.com.au/
It is about countries and in progress.
https://www.commisceo-global.com/country-guides/
It is mainly about some details about manners.
https://guide.culturecrossing.net/index.php
It is mainly about some details about manners.
https://en.wikipedia.org/wiki/List_of_subcultures
Subcultures, modern things.
https://whc.unesco.org/en/list/
Cultural heritages. There is also an interactive map.
https://ich.unesco.org/en/lists/
Intangible cultural heritages.
Guide of travelling cities.
https://www.cia.gov/the-world-factbook/
A formal publication of basic information about countries.
https://worldcultures.webs.com/
Links to other sites about cultures.
History
An encyclopedia. Articles, images, videos, 3D images, podcasts and more.
Detailed articles about history.
https://play.google.com/store/apps/details?id=com.timleg.historytimeline
An app about major events of history.
https://www.hyperhistory.com/online_n2/History_n2/a.html
Basic knowledge of the world history. Good for beginners. Looks old-fashioned, but it is not bad if you get used to it.
Historical events in dots.
It shows you some old news with detailed maps.
Maps of history.
Map of every year. Names of nations can be searched.
https://www.worldhistorymaps.info/
Historical maps. Its works are under a public license.
https://www.oldmapsonline.org/
Old maps around the world.
The site has trouble with the mobile site. You need to set to view the desktop site on mobile.
https://plato.stanford.edu/index.html
Stanford Encyclopedia of Philosophy.
University of Tennessee at Martin's Encyclopedia of Philosophy.
https://www.philosophybasics.com/
The basics of philosophy, “by a layman for the layman”.
Articles about different aspects of philosophy.
Resources about philosophy. Its work is under a public license.
https://www.learnreligions.com/
Articles about religions.
An interfaith community with introductions to spiritual topics.
Downloadable books about religions.
https://en.wikipedia.org/wiki/List_of_religions_and_spiritual_traditions
List of religions and spiritual traditions.
Resources about religions.
Mythology
Basics of myths.
Myth information.
https://en.wikipedia.org/wiki/List_of_mythologies
List of mythologies.
Epic
https://en.wikipedia.org/wiki/List_of_epic_poems
Epics.
Geography
Short articles.
!! http://worldmapquiz.qbisstudio.com/index.html
An app for practising world map in several languages. Dependencies are not all included. The form of address in Chinese version is a mixture of PRC's and ROC's, which is not good. For Chinese names of countries, there is a list: Language/Mandarin-chinese/Vocabulary/Countries-and-Nationalities.
!! https://www.geoguessr.com/seterra/
Game of geography, online or with apps.
Flag identifier.
Street view quizzes.
Street view videos with quizzes.
Music
Information about folk music.
Many tools about music, including similar song finder.
!! https://www.soundhound.com/
Recognize music with recording or your hum. It has some advantages over Shazam.
Recognize music with recording. It has some advantages over Soundhound.
Art
All kinds of artwork around the world.
Dance
!! https://en.wikipedia.org/wiki/List_of_ethnic,_regional,_and_folk_dances_by_origin
Dances by origin. You can search for them on video sites.
https://www.allrecipes.com/recipes/86/world-cuisine/
A bit of recipes around the world.
https://en.wikipedia.org/wiki/List_of_cuisines
List of cuisines.
Sport
http://www.traditionalsports.org/
Introduction to traditional sports.
!! https://drwhut.itch.io/tabletop-club
Multiplayer 3D tabletop games. Still incomplete currently. It is open-source.
!! https://pysolfc.sourceforge.io/
Card and tile games. It is open-source.
!! https://www.gnu.org/software/xboard/
Traditional board games. Its user interface is more cruel than AI opponents. It is open-source.
There are pre-installed engines, but they are somehow old. The most versatile engine is Fairy Stockfish.
Cute Chess looks good, but Xiangqi and Janggi are missing.
Multiplayer platform for playing chess variants.
Strategy game engine and modules. It is open-source.
Information of board games.
Playing card patterns.
Folk Costume
!! https://en.wikipedia.org/wiki/Folk_costume
List of folk costume.
Folktale
Some tales.
Some tale books.
Festival
!! https://en.wikipedia.org/wiki/Category:Lists_of_festivals_by_country
Not complete, but still good.
https://www.world-festivals.net/
It includes more countries than the one above. I wonder if it is so difficult to gather information about festivals.
Martial Art
https://en.wikipedia.org/wiki/List_of_martial_arts
List of martial arts.
Introduction to many martial arts.
Name
!! https://en.wikipedia.org/wiki/Lists_of_most_common_surnames
List of the most popular family names.
!! https://en.wikipedia.org/wiki/List_of_most_popular_given_names
List of the most popular given names.
!! https://www.behindthename.com/
Find the meanings of a given name.
Astronomy
You can see the sky in different locations and times. There are starlores in different cultures. Some even have constellation art.
Living Condition
https://www.numbeo.com/cost-of-living/
Prices from the world. Sometimes inaccurate.
https://www.globalproductprices.com/
The prices of products in different regions. Its work is under a public license.
https://www.globalpetrolprices.com/
The prices of energy in different regions. Its work is under a public license.
Economy
https://www.exchange-rates.org/
Exchange rates.
Basic understanding of trading around the world.
Vehicle
https://www.globalcarsbrands.com/
Automobile brands around the world.
Statistics
All kinds of statistical data. Some are free.
It has detailed explanation on its data.
Train
Information about train travels.
Prepaid SIM Card
https://prepaid-data-sim-card.fandom.com/wiki/Prepaid_SIM_with_data
Details about SIM cards. Its work is under a public license.
License Plate
!! http://www.worldlicenseplates.com/
Take a look if you are interested. It's completed.
Trivia Quiz
Trivia quizzes of the world. It is available in multiple languages.
Model
https://castle-engine.io/view3dscene.php
3D model viewer with support of walking and flying. It is open-source.
3D models, some of which are under public licenses. Make sure your computer's memory is large enough to view them.
You can also use 3D printers to print them if you like.
Character
!! https://wiki.gnome.org/Apps/Gucharmap
Character map for Linux and macOS. It is open-source.
!! https://leun4m.github.io/symbsearch/
Character search for Windows. It is open-source.
!! https://github.com/Ryosuke839/UnicodePad
Character search for Android. It is open-source.
It is also available on F-droid.
!! https://www.google.com/get/noto/
It presents a lot of fonts in one art style. It is open-source.
!! https://unifoundry.com/unifont/index.html
No one covers more of the Unicode map than GNU Unifont. It is open-source.
Its function is limited, such as bad support for South and Southeast Asian characters.
You can go to its “stuff” and search by Unicode characters.
https://github.com/sdushantha/fontpreview
Font previewer in command-line. It is open-source.
Optical Character Recognition
https://github.com/manisandro/gImageReader
It recognizes characters on the screen with Tesseract. It is open-source.
https://dynobo.github.io/normcap/
Capture screen and recognize the characters with Tesseract. It is open-source.
Handwriting recognition for Chinese and Japanese. You can download new models and load them. It is open-source.
https://github.com/SubhamTyagi/android-ocr
It uses Tesseract 4 data on Android. It is open-source.
Language Identifier
!! http://www.polyglot3000.com/
Language identifier.
https://github.com/cisnlp/GlotLID
Language identifier in command-line. It is open-source.
Resource Links
Unlike this page, those are for some specific languages, and I am not responsible for their qualities.
https://commons.wikimedia.org/wiki/Commons:Free_media_resources
Free media resources.
https://www.lexilogos.com/english/index.htm
This one is in a great quantity.
https://www.ats-group.net/language-resources.html
This service has many languages.
This one focuses on ancient languages.
Repository for language researching.
Internet Archive
Archive of the Internet since 1996 and other things. Really cool!
Virtual Private Network and others
Those who are hindered from accessing the world Internet, send an e-mail to it.
Official site: https://psiphon3.com/en/index.html
!! https://www.torproject.org/
For visiting Project Gutenburg and other sites, if some books are still not in public domain in your country. It is open-source.
It won't lead you to the dark web, if you don't know any such address.
It doesn't allow torrenting on the free plan, but there's no volume limit.
They provide 10GB each month with high speed and multiple locations for free. Great for “immersive language learning”.
-- AUTHOR --
Other Lessons
- How to Customise Open–Source Language Games
- Historical Realistic Video Games
- Most Popular Sports
- Ordering with Letters
- How to contribute to wiki lessons (FAQ)
- Elements of Traditional Architectures: Western Europe
- How to be Creative
- Keyboards
- Natural phenomena
- Techniques for learning languages