Description from github
This library contains components commonly used in designing and mocking up mechanical designs. It is currently unfinished and you can expect some API changes, however many things are already working.
This library was created by various authors as named in the individual files’ comments. All the files are licensed under the LGPL 2.1 (see http://creativecommons.org/licenses/LGPL/2.1/ or the included file lgpl-2.1.txt), some of them allow distribution under more permissive terms (as described in the files’ comments).
git clone link: