2 ms·

Yep, LDraw/LeoCAD. http://www.leocad.org/ http://www.leocad.org/ http://www.ldraw.org/ http://www.ldraw.org/

• icebraining 9y ago
  There's also an official software (not necessarily better, of course): http://ldd.lego.com/ http://ldd.lego.com/