Part of Unofficial Updates for Maya.
no matter what you do in Maya you can always use more automation, MacroSystem is something similar to Actions in Photoshop, you can record your actions in Maya and use them any time you want, whether it's a modeling technique or animating an object.
you can also turn your macro into a mel script.
warning no documentation available at the moment.
feel free to send me an email if you come across any questions: