Can anyone here recommend a 2D CAD freeware for mechanical design applications? One of our fitter engineers is wanting a package to create basic 2D layout drawings with to put concept proposals forward to the Design office and is looking for something a lot better that trying to draw in MSWord. I've done a quick search and can see offerings such as FreeCAD, LibreCAD, DataCAD LT, QCAD to name a few. Has anyone tried these packages and can make a recommendation for which they think is the best for creating 2D engineering drawings? 

Many thanks.