As you may know, FreeCAD is an open source CAx RAD, developed in OpenCasCade, Qt and Python. Among others, it has support for macro recording, creating workbenches and has the ability to run as a both a server and a dynamically loaded application. The users can import and manage the following CAD models: IGES, STEP and BRep and the following meshes: STL, BMS, AST and Wavefront OBJ formats.
The latest version available is FreeCAD 0.17, which is still under development.
Because it is available via PPA, install FreeCAD on Ubuntu 18.10 Cosmic Cuttlefish, Ubuntu 18.04 Bionic Beaver and derivative systems is easy. All you have to do is add the ppa to your system, update the local repository index and install the freecad package. Like this:
$ sudo add-apt-repository ppa:freecad-maintainers/freecad-stable
$ sudo apt-get update
$ sudo apt-get install freecad
Optional, to remove freecad, do:
$ sudo apt-get remove freecad