You can make it - Open Source MMORPG Platform
A complete web framework to create online Fighting Fantasy adventures
AutoTeach makes kids study and learn in exchange for internet access.
Modular Gaming Open Source Persistent Browser Based Game Framework
A lightweight HTML5 Game Engine
C-Lesh is a game programming language for 2D games.
Powerful html5 & javascript library for creating applications & games.
Investigo - DX9 Performance and Debugging Toolkit
Formerly CraveJs, it's for creating JavaScript applications and games.
Just a repo for my filterscripts and includes
Create your own online real-time browser-based MMO in your website