Opal Has been Released today!
Opal is a powerful Item Management Application built in Ruby on Rails. It allows you to list any kind of item, from houses to video games to hotdog vendors. When you install Opal, you tell it the name of the items you're going to be listing(example: houses), and that's it! After that, you can create any number of items and show them off using different Item Objects. Try out the demo, or download it for free here:
http://www.hulihanapplications.com/projects/opal