Listenable makes it easy to wire ActiveRecord models to listener classes. Define <Model>Listener classes in app/listeners, declare listen :on_created, :on_updated, etc., and Listenable automatically injects callbacks and subscribes to ActiveSupport::Notifications.

Liszt is an alternative to acts_as_list and sortable that uses atomic Redis operations to maintain scoped ordering information for ActiveRecord objects.

Archive (soft-delete) ActiveRecord database records

Ruby Decorator based framework (aka decorator/presenter objects)

ActiveSupport::MessageEncryptor encryption wrapper for PORO objects and ActiveModel attributes

Ruby Form based framework (aka form objects)

Ruby Query based framework (aka query objects)

Collection of mixins to regulate the state of a database record

Collection of mixins to control the state of a database record

Import and export Ruby and Rails objects to flat files and vice versa

A SQLite based, lightning fast, super efficient and dead simple to setup and use model concern for tagging for Ruby and Rails applications!

Generate or obfuscate Id's using different patterns

Lithium Active Record

Controller request/action monitor

Simple, ActiveRecord-backed data mapper / repository

LiveActivity is a simple activity stream gem for use with the ActiveRecord ODM framework

Tools for exporting and importing between databases managed by ActiveRecord.

livelist-rails is a Rails 3.1 Engine/Extension incorporating the following javascript libraries: Mustache.js, underscore.js, jQuery and livelist.js, and providing ActiveRecord filtering extenstions.

Adds support to LiveRecord for ActiveRecord dependencies

lllibrary is a Ruby library for managing and querying a music library.