LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
LeoCAD - LeoCAD is a CAD program for creating virtual LEGO models.
BlockCAD - BlockCAD is freeware software for forming virtual models with Lego-like bricks.
Stud.io - Build LEGO designs online with friends.
BrickUtils Portable - A slick preferred standpoint of the application is that you can keep it on a removable stockpiling gadget and use it on the go, since it doesn’t should be introduced on your framework.
Mecabricks.com - Mecabricks is an online LEGO building tool.