FreeCAD is a light version of famous AutoCAD.
Developed on the basis of AutoCAD, using open source applications like Python, QT and Open Cascade, FreeCAD offers almost all the capabilities of AutoCAD but it is much more easy to use and comes with a much smaller price tag.
When it comes to precision drawing and 3D modeling there are few professionals who will use anything else except CAD family of programs, knowing that it’s these programs that offer the best possible options and results. It is because of this that FreeCAD was created, allowing all the components needed for mechanical engineering but at a reasonable price. Aside from all this, one the things that makes this program one step in front of the competition is its rather unique modular design allowing constant upgrades and new components, created by both the developers and its user community.