Spree Mail extends Spree by adding a mailing list subscriber model, sign up forms and an admin to send messages.

Convert arrays to CSV (array of hashes, matrixes, ActiveRecord objects etc).

This plugin uses the conductor pattern to wrap multiple models as one object

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.

A simple plugin that automatically generates a key for a model on create. It takes care of protecting the key, automatically generating it and making sure it is unique.

Simplify the definition and storage of "network" relationships, especially useful for social networks.

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

Increment ActiveRecord's counter cache column asynchronously using Resque (and resque-loner).

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

Dynabix dynamically creates read/write accessors on ActiveRecord models for storing attributes in a serialized Hash

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.

Makes using latitudes and longitudes on forms easier.

Harker means Rails deployments via RubyGems--because a package manager is a terrible thing to waste.