ActiveConfiguration is an engine that exposes a generic settings store to ActiveRecord models. Made for very configurable applications, it allows you to avoid implementing specific ways to store settings for each model that needs such configuration. If your application isn't very configurable, ActiveConfiguration is probably overkill.

Entity-attribute-value model (EAV) is a data model that is used in circumstances where the number of attributes (properties, parameters) that can be used to describe a thing (an "entity" or "object") is potentially very vast, but the number that will actually apply to a given entity is relatively modest.

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

Allows you to connect to a second database and systematically transfer those records

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

Make ActiveRecord understand any date format you want.

Put EAV behaviour on your ActiveRecord models

Rails 3 Engine for using the Houdini Mechanical Turk API

Adds the :inverse option to Active Record associations for Active Record 2.3.0 -- 2.3.5.

Nicely documented Push Notification gem for rails 3 applications, has generators for migrations and an initializer with configuration. It is well documented and tested.... compared to other shitty forks out there >_>

A Rails gem to power the jTable jQuery plugin

write common active_record methods in shorthand

Create ActiveRecord models from an existing database