2007-12-19 (New) New User Forum opened! (Yes! This time at Google Groups. Will hopefully not die so soon) 2005-08-07 Gallery update! Don't miss the News Page! BlockCAD Version 3.18 (Freeware) BlockCAD is a freeware program for building virtual models with Lego-like bricks. You can save your models, or save pictures of them (.bmp, .jpg), even reuse a complete model as a part in another model.