freeCodeCamp.org's open-source codebase and curriculum
Master programming by recreating your favorite technologies
Euler Yet another proof Engine
Curated list of project-based tutorials
The imaginary eight-bit machine
SJCE - free portable cross-platform graphical chess game, 100% Java.
Educational Software for children aged 2 to 10.
A classic word guessing game
AutoTeach makes kids study and learn in exchange for internet access.
A programmable platform for a fantasy RPG game.
An application for scheduling vocabulary using the Pimsleur approach
The Quiz of Country and Their Capital.