High Quality Content by WIKIPEDIA articles! VariCAD is a computer program for 3D/2D CAD and mechanical engineering which has been developed since 1988. VariCAD runs on Windows and Linux. It features many tools for 3D modeling and 2D drafting. VariCAD provides support for parameters and geometric constraints, tools for shells, pipelines, sheet metal unbending and crash tests, assembly support, mechanical part and symbol libraries, calculations, bills of materials, and more.