2009
VideoInput - a free windows video capture library
Free video capture library
SFML
Simple and Fast Multimedia Library
2007
AntTweak
A simple GUI library for OpenGL and DirectX
Enet Low level network library
This is a low level UDP control library, which seems to be easy to use.
2006
Particle System API
The particle system API/library
Noise Library
An open source noise library which can generate coherent noise, a type of smoothly-changing noise. libnoise can generate Perlin noise, ridged multifractal noise, and other types of coherent-noise etc...
Object Oriented Input System
A Cross Platform open source input system
Real Matter Physics Engine
A physics Engine which focus on Soft body animation
Anttweakbar
An simple GUI interface API similiar to Crazy Eddie.
PopCap Developer FrameWork
An open source game development framework. Very Simple framework, it seems only suppot 2D only. It seems that engine mainly provide some UI drawing functionality and and app framework.
Fragmosoft
A 3D Model tool which specific for animation creation. It also contain SDK too.
wxAUI Homepage
wxAUI is an open-source advanced user interface library that aims to make it easy to implement "cutting-edge" interface usability and design features for wxWidgets applications....
XEngine
XEngine Project Homepage
MicroPather
MicroPather is a path finder and A* solver (astar or a-star) written in platform independent C++
Apocalyx Game Engine
APOCALYX is a 3D engine written in C++ that uses the OpenGL API, OpenAL, Lua and other open source libraries.
Boost C++ Library
by 13 othersBoost C++ library is a C++ library API to extend the functionality of C++
CharacterFX
An animation SDK and tool for character animation
OmegaCollision.com
Omega Collision Engine
s11n.net
Serialization library in C++
OPCODE
OPCODE collision detection library
SmartWin++
SmartWin Open Source GUI library
Free Programming resources
Contains link for many free programming library
MemeCode-Lgi
Another GUI library called lgi
