Demo of this beautiful game is finally available for Linux.
VariCAD is a 3D/2D CAD system for mechanical engineering. In addition to standard tools for 3D modeling and 2D drafting, the CAD system provides support for parameters and geometric constraints, tools for shells, pipelines, sheet metal unbending and crash tests, assembly support...
AC3D is designed to make the construction of 3D objects fast and easy. It is used to create 3D models for simulations, games, rendering ray-traced images and for scientific and general data visualization.