ScheduleFu allows scheduling events with dates and times. It includes both the model and view portions of a calendar. It borrow heavily from acts_as_calendar (http://github.com/dball/acts_as_calendar) and calendar_helper (http://github.com/topfunky/calendar_helper).

Manage model with a period on ActiveRecord.

Simple Role System for Rails Apps

Step workflows for Rails/ActiveRecord

Support for DB transactions with Capybara

Allows rails models to work as the edges and nodes of a directed acyclic graph (dag). The edges may be typed.

Create associations that combine multiple Active Record associations using a SQL UNION under the hood, with full support for joins, preloading and eager loading on the union association, as well as through-union associations.

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.