Education & Reference

Free content, multilingual online encyclopedia written and maintained by a community of volunteers through a model of open collaboration, using a wiki-based editing system.

Anki is a program that makes remembering things easy. Because it is a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying or greatly increase the amount you learn.

Khan Academy is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.

Translate instantly across 100+ languages with real-time input, voice on mobile, and offline options. Free with Google integration.

Zim brings the concept of a wiki to your desktop. Store information, link pages and edit with WYSISYG markup or directly typing some lightweight markup syntax and see it previewed as-you-type. Creating a new page is easy by either clicking on the "Create new note"...

Wolfram Alpha is a "Computational Knowledge Engine" - different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.

Lightweight offline translation app for Android storing all data locally for increased privacy, featuring fast text-to-speech and efficient copy/paste workflows.

Lightweight iOS flashcard app using spaced repetition, active recall, and offline privacy for flexible study, image support, swipe-based grading, and import features.

Adaptive mental math app with arithmetic practice, speed drills, brain games, step-by-step tricks, personalized plans, and detailed progress tracking.

Free push-to-talk voice-to-text app for Mac and Windows that types what you say in roughly 99 languages, with no account required.

A minimalist, AI-powered micro-learning app designed to turn mindless doomscrolling habits into personalized, 1-minute daily knowledge cards.

Emulate Arduino, ESP32 & Raspberry Pi. in your browser. Write code, compile, and run on 19 real boards — Arduino Uno, ESP32, ESP32-C3, Raspberry Pi Pico, Raspberry Pi 3, and more. No hardware, no cloud, no limits.