Ruby on Rails Opal

Opal is a powerful Item Management System built in Ruby on Rails. It allows you to list any kind of item, from houses to video games to hotdog vendors.
Features

List Any Type of Item(Products, Video Games, Locations, Events, Classifieds, etc.)
Add extra stuff to your Items like Images, Videos, Reviews, Comments, Discussions, Custom Fields, and more.
Powered By Ruby on Rails 3.1
State-of-the-Art Interface powered by HTML5, CSS3, jQuery, and jQuery TOOLS
Multiple-User Login System with Secure Admin Section
CMS-style Page Publishing & Integrated Blog
Easy-To-Use TinyMCE Editor with Security Filtering and Image Uploader
Mass file & image uploader
Upload Images with Special Effects(Rotate, Resize, Watermark, Stamp, B&W, etc.)
Store uploaded files locally or in the cloud using Amazon S3, Rackspace Cloud Files, etc.


Login from other websites(facebook, twitter, google, etc.) with OpenID/OAuth Support
Infinite-Depth Category Organization & Customizable Advanced Item Searching
Internationalization Support for multiple languages & locales
Customizable Themes with easy uploader & installer
For more details: visit
http://hulihanapplications.com/projects/opal