Ruby on Rails

Liquid markup language. Safe, customer facing template language for flexible web apps.

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.

Simple HTTP and REST client for Ruby, inspired by microframework syntax for specifying actions.

A Rails form builder plugin with semantically rich and accessible markup.

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

The Official Ruby Object Mapper for MongoDB

Actor-based concurrent object framework for Ruby

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

Active Record, improved. Live again :)

A modern, simple and very fast Mysql library for Ruby - binding to libmysql

Open Pusher implementation compatible with Pusher libraries

It benchmarks websites, YO!

A Write-Through Cacheing Library for ActiveRecord

A simple Ruby on Rails plugin for creating and managing a breadcrumb navigation.

State machine extracted from ActiveModel

Static analysis Lint-type tool to improve your OO Ruby code

spawn gem for Rails to easily fork or thread long-running code blocks

A simple wrapper for the standard ruby OpenSSL library

HTML forms library for ruby

Theme Support for Rails 3

Gem that allows communication between the models.

Green Shoes is one of the colorful Shoes written in pure Ruby.

Progressive rendering for Rails 2.3.x.

Jabber::Simple

Simple Hash extension to make working with nested hashes (e.g. for configuration) easier and less error-prone.

serve up coffeescript from rack middleware

Help to manage with big amount of features in project (gui for rails)

Alexa Web Information Service

Use the awesome haml-js with sprockets