Morpholio Trace - Morpholio Trace is widely called to be the dream software of the designers and architect.
LeoCAD - LeoCAD is a CAD program for creating virtual LEGO models.
DWG FastView - DWG FastView for Windows is a lightweight dwg/dxf drawing viewer and editor produced by Gstarsoft, no need of dwg format conversion, vector graph magnified without distortion and full compatible with AutoCAD DWG/DXF.
LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
Drawing Desk - Drawing Desk Draw Paint Color, Doodle and Sketch Pad created and published 4Axis Technologies for Android and iOS devices.
Stud.io - Build LEGO designs online with friends.