Tri Vital has created a collection of awesome Maya rigs and put them on gumroad for free!
Tre Vital Rigs (FREE)
Hekaton Rig (FREE)
The Hekaton Rig is a free Maya rig available on gumroad from Luis Perez and Tre Vital
Jason Shum – Videos
Jason Shum is a senior animator at Riot Games and has some awesome free and paid videos on workflow planning, combat, traversal and more!
Animator's Resource Kit 