Nanosoft has this krazy idea that it can give away its CAD software and then make money on... Well, it sounded crazy back in the day (they've around quite a while), but now it's normal. It's just that today we call it making "in-app purchases."
This week they announced a beta test program for nanoCAD Mechanica, a standalone 2D CAD program that comes with tools and a library of parts for creating mechanical designs. It uses "an industry accepted parametric engine" running on their nanoCAD CAD software. It has tools for pneumatics and hydraulics, piping design, gears, shafts, and so on. The user guide is 900 pages.
To join the beta, go to http://nanocad.com/page/Betatester. (The page loaded slowly for me, so be patient.) There is a lot of info about the capabilities of this new software.