É uma gem que gera um model address e partial para cadastro de endereço de forma polimórfica, fazendo uma busca de um endereço ao web service dado um cep.

Passive network mapping tool

Extract cookies from Firefox, Chrome or Chromium sqlite databases into a wget-compatible cookies.txt file.

ActiveRecord plugin for cursor based pagination. Uses some column and rpp (results per page) to paginate your content. The main advantage against traditional pagination (limmit and offset), that the one URL on specific page will contain the data set, despite the newly added entities. It may be useful on the projects, where new entities are added often, and specific page now isn't specific page tomorrow.

flag database records as deleted and hide them from subsequent queries

Develop your Rails engines like you develop your Rails applications.

EagerRecord extends ActiveRecord to automate association preloading. Each time a collection of more than one record is loaded from the database, each record remembers the collection that it is part of; then when one of those records has an association accessed, EagerRecord triggers a preload_associations for all the records in the originating collection. Never worry about that :include option again!

A library for preloading test data in rails applications.

APN on Rails is a Ruby on Rails gem that allows you to easily add Apple Push Notification (iPhone) support to your Rails application. This version includes an association between an assumed User model and APN::Device

Put EAV behaviour on your ActiveRecord models

Rails 3 Engine for using the Houdini Mechanical Turk API

Create ActiveRecord models from an existing database

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.

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).