Open source HTML5 game framework that offers WebGL and Canvas
Open source library for creative expression on the web, desktop, etc.
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Free, cross-platform 2D game engine powered by Haxe and OpenFL
The game engine for everyone
Cross-platform game engine in Rust
ZED OS the clone of Windows XP
2D Game Engine
Children's learning programming language Karel the Robot in 3D
Flash Quiz TV (A quiz game for all family)
A JavaScript game library to quickly develop board games for the web
3D .NET engine for Windows, Linux, Mac
A puzzle game of rules acting upon rules. Create the desired pattern.
C-Lesh is a game programming language for 2D games.
LEGADEE (LEarning GAme DEsign Environment)