Simply put, Fences is a straight-forward way to implement and manage authorization on your Rails application.

Check out Fences at GitHub.com

Gridzilla is an elegant Ruby on Rails implementation for HTML grids/tables that allow developers to easily connect their data to a flexible interface that not only displays the information, but provides numerous hooks for interaction with that data through CSS and Javascript.

Check out Gridzilla at GitHub.com

Flickr-Fu is a Ruby interface that allows developers to connect to Flickr using the Flickr REST API.

Check out FlickrFu at GitHub.com

XML Magic allows developers to magically navigate through XML as if it was simple Ruby objects.

Check out XML Magic at GitHub.com