Take a look at QCAD [www.sillub.com, also published CAM Expert, a computer-aided manufacturing software] or LinuxCAD [Software Forge], or see if you can run a Windows-based CAD app under Wine. I have dosemu running under Fedora (although am having some mouse related troubles with SilverScreen version 4.4, a 3D CAD/Solid Modeling Software I had since 1995, dosemu does work). -Wayde Gutman
