Free, open-source text editor
The free and Open Source productivity suite
LDraw™ editor for LEGO® style digital building instructions.
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Design your own pottery for 3D printing in full color
An STL model viewer, editor, and creator for manipulating STL files.
Cuts 3D objects from polystyrene foam (EPS/XPS)