Takes a folder of animations and transfers them onto any rig with the same controller names. The script will create a new folder called TransferedAnimations in the folder where the animations are located so you don't have to override your old animations. If new attributes or controls are added, the script will just ignore them. You can chose to transfer just a few files or the entire directory.
This is very handy for taking a library of animations and copying all the animations onto an updated rig with a click of a button rather than by hand.
I've only used this on Windows, though its worth trying on other platforms.