Generation next link_to-helper for Rails: Spiced with intelligence, and semantic beauty.

A context aware Rails CMS engine using the Liquid template library. Use the 0.3.x version for Rails 3 compatibility and the 0.2.x version for Rails 2 compatibility.

Rails system mail management solution.

A user-centric watching extension for Rails 3 applications.

Merb plugin that provides support for Sequel.

A Ruby mailing list library designed to be integrated into other applications.

ActiveRecord plugin designed to allow simple multiple table inheritance.

Murakumo is the internal DNS server which manages name information using a gossip protocol.

This plugin makes it possible to define has_many :through relationships that go through other has_many :through relationships, possibly through an arbitrarily deep hierarchy. This allows associations across any number of tables to be constructed, without having to resort to find_by_sql (which isn't a suitable solution if you need to do eager loading through :include as well).

Adds Sequel ORM adapter to the orm_adapter project

Paginate collections using SIZE+1 to determine if there is a next page. Includes ActiveRecord and ActionView support.

Great for storing user preferences

find_by_param is a nice and easy way to handle permalinks and dealing with searching for to_param values

A Redis-backed voting extension for Rails applications.

This gem auto-generates ExtJS compatible model specifications from your ORM (eg: ActiveRecord, DataMapper, MongoMapper)

SexItUp allows for the easy drop-in of public domain images for site mockups and user avatars.

Use SimpleAdmin to build out filtering, searchable, editable interfaces for your models

Social Stream is a Ruby on Rails engine providing your application with social networking features and activity streams. This gem allow you to add events as a new social stream activity, with a calendar-supported management

Debug SQL statements in ActiveRecord by displaying warnings on bad queries.

Typed serialize makes sure your serialized attribute is always the specified type.