GNU LibreDWG is a free C library to handle DWG files. It aims to be a free replacement for the OpenDWG libraries. DWG is the native file format of AutoCAD. GNU LibreDWG is based on LibDWG, originally written by Felipe Castro.
Current version: https://github.com/LibreDWG/libredwg/releases/tag/0.9
Changelog: https://raw.githubusercontent.com/LibreDWG/libredwg/master/NEWS
License: GPLv3