"LeoCAD is a CAD program for creating virtual LEGO models. It has an easy to use interface and currently includes over 6000 different pieces created by the LDraw community." http://www.leocad.org/trac Reproducible: Always
I wrote an ebuild some years ago and committed to sunrise overlay, see http://gpo.zugaina.org/Overlays/sunrise/media-gfx/leocad . But I don't know if it still works.
*** This bug has been marked as a duplicate of bug 235607 ***