A free and open source multiplatform 3D parametric modeler
The programmer's solid 3D CAD modeller
Cross-platform Open-source 2D CAD
Open Source Desktop GIS with Surveying and Cartography Functionality
City maps, military maps, mine maps, the power of geography with C++
Automated detection of the unknown early map projection
Converts between many 3D data formats
Open DXFs with QCad
Application for management of CAD files and projects
library to read dwg & read/write dxf files
Software for design single skin kites, speedgliders and paragliders
collection of illustrative programs:small games, simulators: C, Matlab