OpenSCAD Graph Editor
Blockbench - A low poly 3D model editor
The programmer's solid 3D CAD modeller
A free and open source multiplatform 3D parametric modeler
A python parametric CAD scripting framework based on OCCT
STL Viewer for java
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
LDraw™ editor for LEGO® style digital building instructions.
3D modeler, 3D game maker, 3D demo maker
Free cad viewer for 3d drawings in different formats
Open-Source Shoemaking
An easy to use and lightweight CAD model data management tool.
The Filmakademie Application Framework
A 3D scene editor for Ogre in Purebasic
Hashing and spatial concurrency library.
Convert heightmaps to stl
Cuts 3D objects from polystyrene foam (EPS/XPS)