For 2D drafting and 3D parametric modeling, FreeCAD rivals AutoCAD 2012 in functionality. It runs on Windows, Mac, Linux, and never expires. The learning curve is manageable, and it reads/writes DWG via converters.
For a professional or a student aspiring to work in a professional environment, downloading and running an X-Force keygen is akin to playing Russian Roulette with your computer and your career. Here are the primary risks: xforce for autocad 2012
Using cracks or keygens to bypass software licensing is a form of software piracy. Autodesk and other software companies invest significant resources into developing their products. For 2D drafting and 3D parametric modeling, FreeCAD
It is worth noting why AutoCAD 2012 is still a target for piracy. xforce for autocad 2012