RibbonSoft

QCad
FreeCreate technical drawings such as plans for buildings, mechanical parts, or schematics and diagrams.
Windows
QCad Portable
FreeCreate technical drawings such as plans for buildings, mechanical parts, or schematics and diagrams.
Windows
Qcad for Linux
FreeGet a multi-platform 2D CAD system and the flagship product.
LinuxQCad
Trial versionCreate technical drawings such as plans for buildings, interiors, or mechanical parts.
Mac