Provides an internal extension API to ActiveRecord, in the form of middleware-style callback stacks

A smart sms verification tool

Read from stand-by databases for ActiveRecord

State machine that allows dynamic transitions for business workflows

Sharding

Rails way to harness the power of SQL "EXISTS" statement

ActiveRecord/Rails Integration for the Workflow library. Workflow is a finite-state-machine-inspired API for modeling and interacting with what we tend to refer to as 'workflow'.

A smart sms verification tool

Simulate multi-table inheritance for activerecord models using a polymorphic association

ActiveRecord Stand-alone migrations

Awesome patches backported for ActiveRecord MySQL adapters

MySQL index hint support for ActiveRecord

Rescue from MySQL and Sqlite duplicate errors

Rails ActiveRecord connector for Google Spanner Database

Add relational OLAP-like functionality for ActiveRecord

Directed Acyclic Graph hierarchy for Rail's ActiveRecord, supporting Rails 4.x

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.

Oauth and OpenID made dead simple, added custom token settings for Facebook

Extension for ActiveRecord that adds support for PostgreSQL array columns, mapping string values to integers.

Restrict the values assignable to ActiveRecord attributes or associations