1. FreecadThis is the official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler. Issues are managed on our own bug tracker at https://www.freecadweb.org/tracker
3. Freecad LibraryA library of Parts for FreeCAD. WARNING - This library is huge. It might take a long time to download and make the addons manager unresponsive for many minutes.
4. Freecad AddonsA convenient gathering of useful and well-developed FreeCAD plugins made by the community.