LibreCAD - Free Open Source 2D CAD
librecad.orgOpen Source 2D-CAD. LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation are free from our large, dedicated community of users, contributors and developers.
FreeCAD: Your own 3D parametric modeler
www.freecad.orgFreeCAD is a multiplatform (Windows, Mac and Linux), highly customizable and extensible software. It reads and writes to many open file formats such as STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE and many others, making it possible to seamlessly integrate it into your workflow. Designed for your needs