Magic Another Game Engine
World Class Leader Board Editor.
Cross-platform, open source, and super fast MUD client with scripting
A fresh & lightweight javascript game engine
Descent 3 by Outrage Entertainment
An OpenGL RTS game engine written in C
Edit diagram.sty LaTeX diagrams
Injectable LUA scripting system, SDK generator, live property editor
Final Fantasy VIII Save Editor
Edit BZFlag world maps with 3D preview
This is a Units Editor for Empire At War which will make things easy.
A Modern Crosshair Overlay
A toolbox for Sid Meier's Civilization
Play mechanical keyboard sounds, typewriter sound as you type
A planetarium software that shows a 3D simulation of the night sky
Final Fantasy VII field archive editor
A Editor for Minecraft NBT files
Retro style, multi-platform soccer game
3D racing game with Sci-Fi elements and Track Editor
GPS track editor for editing tracks and planning (multiple) day tours
Europa Universalis 4 save game editor