The source code to VVVVVV
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Open source library for creative expression on the web, desktop, etc.
quiz game with spin wheel
Create tennis tournament schedule
2D Game Engine
Children's learning programming language Karel the Robot in 3D
A JavaScript game library to quickly develop board games for the web
Original turn-based strategy wargame & boardgame