X3D is the open-standard format for 3D graphics scenes on the Web.
3d Procedural Generator
3D Procedural Modelling and Procedural Texturing Tool in OpenGL/C++
A tool for creating Terrains.
A language for making art using mathematics
A tool to generate Tree sprites and voxels for the Doom game
A tool to generate Rock sprites, models and voxels for the Doom game
A tool for creating voxels for the DelphiDoom Engine