Roadie tries to make sending HTML emails a little less painful in Rails 3 by inlining stylesheets and rewrite relative URLs for you.

Fluentd Filter plugin to concat multiple event messages

Full HMAC auth implementation for use in your gems and Rails apps.

Cequel is an ActiveRecord-like domain model layer for Cassandra that exposes the robust data modeling capabilities of CQL3, including parent-child relationships via compound primary keys and in-memory atomic manipulation of collection columns.

Translations for the devise gem

CMS for Rails. For Reals.

CMS for Rails. For Reals.

dotiw is a gem for Rails that overrides the default distance_of_time_in_words and provides a more accurate output. Do you crave accuracy down to the second? So do I. That's why I made this gem. - Ryan

Calagator is an open source community calendaring platform

Process your Paperclip attachments in the background with ActiveJob

Calagator is an open source community calendaring platform

Often times you'll end up with empty strings where you really want nil at the database level. This plugin automatically converts blanks to nil and is configurable.

Tolk is a web interface for doing i18n translations packaged as an engine for Rails applications.

This gem creates a scope for unread objects and adds methods to mark objects as read

This gem configures Rails for CloudFlare so that request.ip and request.remote_ip and work correctly.

Foundation on Sass/Compass

I18n ActiveRecord backend. Allows to store translations in a database using ActiveRecord, e.g. for providing a web-interface for managing translations.

Socialization allows any model to Follow and/or Like any other model. This is accomplished through a double polymorphic relationship on the Follow and Like models. But you don't need to know that since all the complexity is hidden from you.

Test your Rails Engines without needing a full Rails app

CSS toolkit from Twitter For Rails 3.1+ Asset Pipeline. Best one of all!