A C/C++ library for creating hardware accelerated 2D games for Microsoft Windows. It provides minimal yet fully functional and flexible set of routines for handling graphics, sound and input. [Shareware] http://hge.relishgames.com/
libCON DirectX C++ libraries and ColDet collision detection libraries. Documentation, tools, code examples, and game skeletons available. http://photoneffect.com/default.html
Offers a freeware Java software capable of building and running multiplayer adventure games, playable with any browser. Several multiplayer games are available for free as a demo. http://www.dimensionex.net/en/
Pathfinding library for games, optimal paths through maps, timing objects and their movements through maps. Sample application available. http://pathlib.hildebrand.cz/pathlib.html