Blockbench - A low poly 3D model editor
Blender addons to make the bridge between Blender and geographic data
The open source mesh processing system
An interior design application to draw house plans & arrange furniture
a parametric 3D CAD modeler
Open Source Solid Modeling CAD
X3D is the open-standard format for 3D graphics scenes on the Web.
3d Procedural Generator
3D slider puzzles for kids; helps teach solid geometry
3D modeler, 3D game maker, 3D demo maker
Java3d scenegraph editor
C# graphics library used for 3D modeling, built with OpenGL/OpenTK
Subdivision Surface Object Creator Open Source Project
Open-Source Shoemaking
Xj3D is an open-source Java codebase for the X3D Graphics standard.
The programmer's solid 3D CAD modeller