Nitrous.IO is a cloud-based development environment.
With Nitrous, you are able to write and store your application development online and access it on the go at shared office machines, on your iPad or Chromebook.
Another cool feature is the ability to work on files together via collaborative mode with other developers. In this mode, any changes and selections you make in your IDE get sent to the other people working with you.
As of this writing, Nitrous does not have native support for Grails. But you are able to build and run grails applications given that it provides a full linux command line.
In this post, I will show you how to build and deploy a Grails application on Nitrous.