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

UI interface for rails-settings-cached in active admin

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

MySQL index hint support for ActiveRecord

Fast Rails serializer with built-in caching

Easy Parallel Executing using Celluloid

gem for adding DKIM signatures to email messages

Fluentd filter output plugin to anonymize records with HMAC of MD5/SHA1/SHA256/SHA384/SHA512 algorithms. This data masking plugin protects privacy data such as UserID, Email, Phone number, IPv4/IPv6 address and so on.

Fluentd plugin to rewrite tags/values along with pattern matching and re-emit them.

https://github.com/tsukasaoishi/fresh_connection

Shared code for Pact gems

lazy_migrate lets you easily see which migrations have and have not been run, and makes it easy to up/down/migrate/rollback your migrations through a terminal UI. You can even bump migration versions in the event that you've just pulled master and somebody else merged their migration before yours.

Automatic detecting missing I18n translations tool.

A basic Mandrill delivery method for Rails.

Implements the common view pattern by which a list of messages are shown at the top, often a combination of flash messages and ActiveRecord validation issues on one or more models.

Store nested hashes and other types in ActiveRecord hstores

Improve perceived performance of your rails application with minimum effort

An extension to paper_trail, using this you can fetch actual object who was responsible for this change

Organize ActiveRecord model into a tree structure using PostgreSQL LTree

Debugging toolbar for Rack applications implemented as middleware. Based on logical-insight and rack-bug.