BareCoffee
An Extension for Sprockets to enable --bare option for CoffeeScript's compiler. Thus, it will compile file without a top-level function wrapper.
All you have to do is add this line to your Gemfile:
gem 'bare_coffee'
This will automatically register "*.bare-coffee" file extension
Notes
This is not highly recommended for production or anything, but this might be useful for testing, experiment, and development.