15
Valve
19
Freeware
A tool, shared between all owners of Valve Source games and locked to a particular engine.
3
WinInizio.it
49
Freeware
This software Wininizio games includes many classic videogames.
Jeaks
4
Freeware
An add-on for Explorer and Firefox users interested in games.
Microsoft
45
Freeware
Makes Visual Studio a powerful tool for building games with Unity.
IDV, Inc.
26
Demo
SpeedTree for Unity helps you to design vegetation for games.
2
Microsoft Corporation
2,636
Freeware
Write and debug Unity 3D games inside Visual Studio.
2
Benjamin Marty
52
Open source
A comprehensive open-source tool to create your own 2-D animated games.
2
Simon Judd
201
Open source
SLADE is a modern editor for Doom-engine based games and source ports.
1
Daniel Bailey
13
Freeware
GLScript is a simple open source script interpreter for developing 3D games.
11
ExE Productions
934
Freeware
Manic Digger is an open-source implementation of block-building games.
4
AdvancedFX
135
Freeware
HLAE is a collection of tools to enrich GoldSrc and Source Engine based games.
66
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.
