https://evilmartians.com/chronicles/introducing-overmind-and-hivemind

Procfile, introduced by David Dollar’s foreman, is a popular format for declaring processes—everyone who ever used Heroku, knows it well. Anyone who didn’t, really should learn it—it’s an easy way to declare all the stuff that is needed to run your project (web app, additional apps, background processing, tools and daemons) and launch it.

Unfortunately, foreman had some limitations, so there are new kids on the block—tmux support, tons of features, speedy and stable. Check them out!

P.S. even though the stuff is not written in Ruby, I believe it would be super useful for Ruby developers especially—sorry if not true!