The If Works · PackR

The If Works · PackR: "PackR is a Ruby port of Dean Edwards’ MIT-licensed JavaScript compressor, Packer. It is made available as a plugin for Ruby on Rails. This version is based on Packer 3.0. You may find that the results it produces are not strictly identical to those of the JavaScript version, but the difference is just a question of how the base-62 word list is ordered — your scripts will work just like those produced with the online version. The level of compression achieved is identical between the two versions."