Running & deploying Ruby apps to places like Viaduct & Heroku is really easy but running processes on actual servers is less fun. Procodile aims to take some the stress out of running your Ruby/Rails apps and give you some of the useful process management features you get from the takes of the PaaS providers.
Procodile is a bit like Foreman but things are designed to run in the background (as well as the foreground if you prefer) and there's a supervisor which keeps an eye on your processes and will respawn them if they die.
Procodile works out of the box with your existing Procfile.
