Ucredential
This little gem generates user credentials. Right now it receives a couple of users and generates a zip file in the public directory containing a pdf file with four credentials per pager.
It uses resque for background process so you have to start redis first:
redis-server
And then start the background process.
rake resque:work QUEUE="*"
Don't forget you can mount the resque dashboard in you rails app to know whats going
mount Resque::Server, :at => "/resque"