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.

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

Elasticsearch integrations for ActiveModel/Record and Ruby on Rails

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

Database Sharding for ActiveRecord

Turbo-charged counter caches for your Rails app.

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

Easily and efficiently make your ActiveRecord models support hierarchies

Identify database issues before they hit production.

Enumerated attributes with I18n and ActiveRecord/Mongoid support

Just the right amount of Rails eager loading

Database changes log for Rails

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

Modern encryption for Ruby and Rails