Ruby on Rails

Track changes to your rails models

Object-based searching.

AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, NoBrainer, Dynamoid)

Annotate Rails classes with schema and routes info

Versioned database views for Rails

Audited (formerly acts_as_audited) is an ORM extension that logs all changes to your Rails models.

Elasticsearch integrations for ActiveModel/Record and Ruby on Rails

Easy activity tracking for models - similar to Github's Public Activity

SQL query builder, written in c#, helps you build complex queries easily, supports SqlServer, MySql, PostgreSql, Oracle, Sqlite and Firebird

Database Sharding for ActiveRecord

IdentityCache is a blob level caching solution to plug into Active Record. Don't #find, #fetch!

Turbo-charged counter caches for your Rails app.

Easily and efficiently make your ActiveRecord models support hierarchies

Enumerated attributes with I18n and ActiveRecord/Mongoid support

Date and time validation plugin for ActiveModel and Rails. Supports multiple ORMs and allows custom date/time formats.

Identify database issues before they hit production.

Database changes log for Rails

Just the right amount of Rails eager loading

Modern encryption for Ruby and Rails