A Rails gem that provides a clean way to associate external IDs from third-party systems with your ActiveRecord models using polymorphic associations.

Ext JS 4 is the next major advancement in our JavaScript framework. Featuring expanded functionality, plugin-free charting, and a new MVC architecture it's the best Ext JS web application development platform yet. Develop incredible web apps for every browser.

ExtSprockets

ExtYarn

Make Jay Salvat's Ezdz [izy-dizy] available to Rails

Fabrication gem meets Rails generators

Adds Facebooko configuration options to Rails applications

This gem provides Facebox for your Rails 3 application.

Facebox for rails

This gem provides Facebox for your Rails 3+ application.

Command pattern for Ruby

This gem provides Faker.js for your Rails application

A gem version of the fam-fam-fam-icons-on-rails plugin, originally by Dayne Broderson

This gem helps to use Famo.us in Ruby on Rails.

Gem to automate use of the Onion's fartscroll.js using asset pipeline.

A ruby interface that determines file ownership for git repositories

Fauve lets you manage your app's colour scheme

Haskell fay adapter for the Rails asset pipeline.

FC Webicons Set is a set of resolution-independent social icons for use on your website. They use feature-detected SVG graphics (with PNG fallbacks) to display the icons over their appropriate negatively indented anchor titles. (Icons are CC-Attrib; attrib to http://fairheadcreative.com; thanks!)

FeatureMap helps identify and manage features within large Ruby and Rails applications. This gem works best in large, usually monolithic code bases for applications that incorporate a wide range of features with various dependencies.