An add-on for Explorer and Firefox users interested in games.
Fusion Pack: Source is the first fully featured replacement pack to be released.
A tool, shared between all owners of Valve Source games and locked to a particular engine.
The Source Engine Automatic Demo Saver allows users to record and save demos.
Exhedra Solutions, Inc.
Easily use advanced graphic techniques like fractals, imaging and DirectX.
A game which combines leading-edge character animation and real-world physics.
A comprehensive open-source tool to create your own 2-D animated games.
SLADE is a modern editor for Doom-engine based games and source ports.
GLScript is a simple open source script interpreter for developing 3D games.
Manic Digger is an open-source implementation of block-building games.
HLAE is a collection of tools to enrich GoldSrc and Source Engine based games.
3DS Emulator is a closed source Nintendo 3DS games emulator for PC.
Game Buffer in an open source app that optimizes your system for games.