Disables observers during testing, allowing you to write model tests that are completely decoupled from the observer. Also lets you enable observers for a certain block of code, so that you can write observer tests
Remotipart is a Ruby on Rails gem enabling remote multipart forms (AJAX style file uploads) with jQuery.
Offload CarrierWave's image processing and storage to a background process using Delayed Job
Tolk is a web interface for doing i18n translations packaged as an engine for Rails 2.3 applications
Authenticate your users with RPX in your Rails application using Devise