gSculpt - Home
Computers, Software, Graphics, 3D - gSculpt. An Opensource 3D modeling application based on Cybersculpt a 3D modeling application for the Atari ST range of computers.
https://gsculpt.sourceforge.net/
Shapescape
Polyhedra modeling software for art and education.
https://www.shapescape.com/
Kitware Inc. - leading edge, high-quality software
Computers, Software, Graphics, 3D - Kitware Inc. Visualization Toolkit. VTK is an open source, freely available software system for 3D computer graphics, image processing, and visualization.
https://www.kitware.com/
Geometry Utility Library
Computers, Software, Graphics, 3D - Geometry Utility Library. GUL - Geometry Utility Library for construction, evaluation, manipulation and visualization of geometric objects, especially for parametric and implicit defined surfaces.
https://gul.sourceforge.net/