Jeaks
4
Freeware
An add-on for Explorer and Firefox users interested in games.
3
Fusion NET
211
Freeware
Fusion Pack: Source is the first fully featured replacement pack to be released.
15
Valve
19
Freeware
A tool, shared between all owners of Valve Source games and locked to a particular engine.
SEADS
14
Open source
The Source Engine Automatic Demo Saver allows users to record and save demos.
4
Exhedra Solutions, Inc.
Commercial
Easily use advanced graphic techniques like fractals, imaging and DirectX.
9
Valve
13
Freeware
A game which combines leading-edge character animation and real-world physics.
2
Benjamin Marty
50
Open source
A comprehensive open-source tool to create your own 2-D animated games.
2
Simon Judd
151
Open source
SLADE is a modern editor for Doom-engine based games and source ports.
1
Daniel Bailey
11
Freeware
GLScript is a simple open source script interpreter for developing 3D games.
11
ExE Productions
930
Freeware
Manic Digger is an open-source implementation of block-building games.
4
AdvancedFX
123
Freeware
HLAE is a collection of tools to enrich GoldSrc and Source Engine based games.
65
3DS Emulator
779
Freeware
3DS Emulator is a closed source Nintendo 3DS games emulator for PC.
2
Advtweaks
12
Open source
Game Buffer in an open source app that optimizes your system for games.
