Open Source Tcl 3D Modeling Software for Mac

BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.

SaVi - simulate Starlink, Iridium, Globalstar, O3b, GPS, Galileo and other satellite constellations, modify them, or design your own. Requires Tcl/Tk and Unix libraries; 3D viewing option requires Geomview running on X Window.

The Open-Source PyMOL repository has been moved to github: https://github.com/schrodinger/pymol-open-source We still use the pymol-users mailing list here on sourceforge. Please subscribe for community support: https://pymol.org/maillist (Note: SourceForge email newsletter and special offers are optional and can be unchecked) The PyMOL community wiki has its own home: https://pymolwiki.org/

Ayam is a free 3D modelling environment for the RenderMan interface.

A work-in-progress LDraw.org parts author's CAD program. Currently only a simple renderer. But progress is being done..

GNU Autoconf, Automake and Libtool scripts and makefiles for the Open CASCADE solid modeler. http://www.opencascade.org

Open Source and Portable object oriented software for 3D digital image segmentation and visualization. Pipes and Filters Architechture. Implemented in C++, and uses FLTK, VTK, ITK, TCL (plugins), and pipeline filters implemented in XML. DICOM support.

Command line application that enables you to create wide range of domes, vaults, tubes or egg-like shapes from triangular desks. The arch is always in the shape of catenary that makes it possible to design and build extremely tough models or buildings suitable for underground/underwater architecture. The program has two outputs. The first is OBJ file you can import to 3D modelling software, such as Autocad or Blender. The second output is CSV file you can open in OOCalc or Excel and use as plans for actual construction. The application is written in Tcl and released under WTFPL.