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Not on github, but, IIRC, Catia is written mostly in Lisp.

• epsylon 12y ago
  You're probably thinking of AutoCAD, which isn't written in Lisp, but scriptable using Autodesk's variant of Lisp.
  • lispm 12y ago
    http://www.ptc.com/product/creo-elements-direct/modeling http://www.ptc.com/product/creo-elements-direct/modeling written mostly in Lisp
    • zvrba 12y ago
      Yes, it was PTC. I couldn't remember it. Thanks.