Do you like Sinatra? Do you like Node.js? Wish you could write Node.js apps in Ruby as easily as you write Sinatra apps? Let's ask Cool.io how. Cool.io lives on Github A Quick Tour Hi, I'm Coolio, the fabulously wealthy singer of Gangster's Paradise. Let's write an event-driven echo server: See? Look at that, it's easy! But how's it work? Let's take a peek into the parts of my DSL: cool.io.server