rails-angular-motion 
rails-angular-motion wraps the Angular Motion CSS3 animations for use in Rails 3.1 and above.
Usage
Add the following to your Gemfile:
gem 'rails-angular-motion'
Add the following to your Rails CSS manifest file:
*= require angular-motion
If you desire to require minified version, add the following:
*= require angular-motion.min
Versioning
Current version of Angular Motion - 0.4.2