Cross-platform Open-source 2D CAD
Free minimalist software for maps, import DWG, DXF, SHP, KML, GeoJSON
File Manager / General Viewer / Commandline utility / Generic Frontend
C library to read DWG files.
Testsuite for libdwg
library to read dwg & read/write dxf files
Explore with geometric curves. Create images of spirograph curves,
Insert PDF into DWG in AutoCad. Autolisp Frontend for PSTOEDIT