Frame by Frame
First up is a tumblr full of animation gifs juxtaposed with the frames they represent. Frame by Frame is a great resource for studying short clips of animation. Make sure you look for all 12 of the principles in them.
Scripts from Morgan Loomis
Next we have what looks like a great set of tools for Maya. I noticed them starting to float around twitter so I had to take a look. In all there are 12 scripts for daily use that creator Morgan Loomis has shared with us. Included among other great tools are a substitution tracer, a breakdown and a hold assistant.
To download go to the blog.