Alexander Zagoruyko recently updated his Automatic Rigging System for Maya. You can get a demo version of the Script, and if you like it you can purchase the real version… a bit pricey though coming in at $100.00.
“Let me to introduce a rigging system written in MEL for Maya.
Through the use of standard Maya features and lack of expressions, character that rigged this system works fast and stable.
You can try it: http://alexanderzagoruyko.ru/projects/autorig/scriptedRig.rar
You can create a rig for ANY human-characters. There is a possibility to make rigs without arms, legs, fingers, feet and eyes.
Some of features:
IK/FK/FIX for arms and legs
Easy and powerful foot setup
IK/FK for fingers
Stretch/Squash with ability to save volume
StretchRig. This is an additional system to control shape of neck,head,shoulders,arms,legs,fingers
Head and neck stretches
Dynamic parent
Forced scaling for each joint (for example, arm, forearm)
Seamless IK/FK and FK/IK switching with ability to save scales
Seamless dynamic parent switching
Fully customizable selector
No plugins required!
No expressions are used!
Now presets for interface are available!
The main feature of the system is an idea. It is a great foundation for your futher development. You can change whatever you want. Good luck and happy rigging!”