This Vagrant plugin allows you to configure a vm environment as a node in a client/server infraestructure. See also vagrant-nodemaster

Keep your code DRY by inferring column validations from table properties! Automagically validate presence, length, numericality, inclusion and uniqueness of ActiveRecord backed columns.

Simple and real-life tested Rails::Engine admin interface

Support for binary UUIDs in ActiveRecord

extracted code from mysql2

Something with the combination of Rails 3.1, Mysql2 0.3.x, Capybara, Selenium/Webkit/etc causes Mysql to raise exceptions where the connection is waiting on a result. This gem provides an auto-retry capability with the Mysql2Adapter to retry any query execution up to 5 times. This is a a temporary solution until the real issue with the above libraries/frameworks are resolved. This should NOT be used in production.

Adds a :uuid column to ActiveRecord MySQL2 Adapter. Store UUIDs as 16 bytes binary column.

It is a library that performs extended verification when an error occurs when executing SQL.

Sharding library for ActiveRecord(MySQL)

Allows the use of TiDB as a backend for ActiveRecord and Rails apps.

Define attributes in arel

Rails: Get notified when an after_commit block blows up

Rails engine to implement a Ruby backend store implementation for Annotator, an open-source JavaScript library to easily add annotation functionality to any webpage.

An easy to use, framework agnostic, customizable library to easily store and retrieve application configuration.

Provide usage statistics about how your application is being used

This is a functional replacement for acts_as_archive in rails 3 applications, the only functionality that is not duplicated is the migration from acts_as_paranoid

Access mysql without blocking.

An ActiveRecord extension for writing commonly useful atomic SQL statements to avoid race condition.

Works with Facebook.

A highly available, reliable messaging infrastructure