3D Procedural Modelling and Procedural Texturing Tool in OpenGL/C++
Map Generation Application and API
A graphical NBT editor for all Minecraft NBT data sources
Editor for configuring the open source navigation program Navit
Free Grid Gallery Responsive
Create symmetric sprites: browse, save to PC, or store online
Easy creation of normal maps
GameWizzard is a Sprite editor.
3D world editor for game development
A GUI Level Editor for the Enigma Game
KPEdit - A 2D skeletal animation editor.
Easy Terrain editing and Heightmap creation
A 3D scene editor for Ogre in Purebasic
Java3D Scene Creator