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BRL-CADSolveSpace
Free

Free and open source under the LGPL.

 Free

Free and open source under the GPL.

Windows, macOS, Linux Windows, macOS, Linux
  • Constructive solid geometry with genuine analysis and ray tracing tools
  • Decades of development and a stable, scriptable command set
  • Real parametric constraint solving, so dimensions drive the model
  • Exports STL, STEP and DXF for 3D printing and machining
  • The interface is unlike commercial CAD and takes serious effort to learn
  • Not aimed at mechanical drafting or 3D printing workflows
  • The interface is bare and the workflow unlike mainstream CAD packages
  • Not suited to large or highly complex assemblies
Downloadable app Downloadable app
Open source Open source
License: LGPL-2.1 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.