This is a free Python script to help you to create Rigs in Maya.

It is modular, multi-language and object oriented, that means you can use it to create many type of Rigs that you want without a lot of work.

You just need to download the rar file and extract it in a Maya Path folder like for example, C: / Program Files / Autodesk / Maya2011 / Python / Lib / site-packages, then you use the command above to call the UI (User Interface).

For Mac, you can copy the files in  / Users / yourUserName / Library / Preferences / Autodesk / maya / 2012-x64 / scripts.

import maya.cmds as cmds
import dpAutoRigSystem
import dpAutoRigSystem.dpAutoRig as dpAR
reload(dpAR)
dpUI = dpAR.DP_AutoRig_UI()
print "\ndpAutoRigSystem loaded with success."

You can find more information about it in my blog: nilouco.blogspot.com
I hope you like it :)
Thanks.