Ruby on Rails is a web application stack written in Ruby with a focus on "convention over configuration", testing, and rapid application development.

It will be included in Mac OS X Leopard.

Official site

http://www.rubyonrails.org/

See also

• "Capistrano: Automating Application Deployment": http://manuals.rubyonrails.com/read/book/17
• "Really Getting Started in Rails": http://www.slash7.com/articles/2005/01/24/really-getting-started-in-rails
• "How to show Google's Web Accelerator the door in Rails": http://david.backpackit.com/pub/37983
• "Skinny Controller, Fat Model", an excellent article that argues for and uses code examples to demonstrate keeping code out of views, simplifying controls, and letting models do the heavy lifting in the interests of better readability, maintainability and correctness: http://weblog.jamisbuck.org/2006/10/18/skinny-controller-fat-model