RenderDoc is a stand-alone graphics debugging tool
Memory Efficient Serialization Library
Orx: Data-Driven Game Engine
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Cerberus Content Management System
Everything you need to build and deploy scalable realtime 3D apps
Cinema Enters Game Console
ZED OS the clone of Windows XP
Build Cross-platform Applications
Highly customizable library for procedural world generation
3D .NET engine for Windows, Linux, Mac
The solution to all your problems
C-Lesh is a game programming language for 2D games.
LEGADEE (LEarning GAme DEsign Environment)
This is a base PHP framework for making simple websites with clean URL
Java based Open source Voxel Engine for RTS games