Truong Rigs – A massive selection of free and paid rigs all made by Truong
Truong Rigs (FREE+)
After Effects
After Effects is an adobe product and is a very popular motion graphics and visual effects programs. Useful for editing and adding post-effects to animations.
Polycount Challenge
Current Challenge – Anime Action. A challenge hosted by the Polycount community that changes theme every few weeks. No Deadlines. Just for funsies!
#animonthly
#animonthly is a monthly twitter challenge created by Ross O’Donovan
11 Second Club
11 Second Club – A monthly competition that focuses on animating to a different piece of dialogue each month.
Anime Speed Lines
Free anime speed lines to use in your animations.
Transformation Breakdown
A workflow breakdown by Adam Turnbull of how he morphed between three different rigs
BodyMech Rigs ($40)
BodyMech Rigs are a series of Maya rigs, designed to be perfect for honing in on those body mechanics and body acting skills.
Animator's Resource Kit 