The goal is to greatly increase the efficiency and optimize your workflow so that you have more time concentrating on the animation itself.
MGTools is a combination of Mel, Python and C++ plug-in, but don’t worry about the compatibility aspect of you Maya scene, it won’t create any custom nodes in your scene. It is designed for general animation workflows, applicable on any animation Rigs.

Home Page - http://mgland.com/MGtools_en.html