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A Bingo Rails A/B testing. One minute to install. One line to set up a new A/B test. One line to track conversion.

Action Mailer Action Mailer is a framework for designing email-service layers. These layers are used to consolidate code for sending out forgotten passwords, welcome wishes on signup, invoices for billing, and any other use case that requires a written notification to either a person or another system. Additionally, an Action Mailer class can be used to process incoming email, such as allowing a weblog to accept new posts from an email (which could even have been sent from a phone).

Action Query jQuery and ActiveRecord, sitting in a tree...

Acts as Audited acts_as_audited is an Active Record plugin that logs all modifications to your models in an audits table. It uses a polymorphic association to store an audit record for any of the model objects that you wish to have audited. The audit log stores the model that the change was on, the “action†(create, update, destroy), a serialzied hash of the changes, and optionally the user that performed the action.

Acts as fu When you need a dash of ActiveRecord and nothing more. Now you have no excuse for not test-driving your ActiveRecord extending plugins.

Anemone Anemone is a Ruby library that makes it quick and painless to write programs that spider a website. It provides a simple DSL for performing actions on every page of a site, skipping certain URLs, and calculating the shortest path to a given page on a site. The multi-threaded design makes Anemone fast. The API makes it simple. And the expressiveness of Ruby makes it powerful.

Asset Trip Asset Trip bundles JavaScript and CSS files at deploy time. The assets are then served from a Git-esque object store in the application’s public directory.

Association Freezer Freeze an Active Record belongs_to association to ignore any future changes.

Bacon Bacon is a small RSpec clone weighing less than 350 LoC but nevertheless providing all essential features.

Badger Badger is a library used to generate badge sheets for events, given a PDF template and data for the badges.

Barista Barista is very, very similar to bistro_car (infact, credit where credit is due - it shares similar code / is almost a fork). The main difference being, it lets you use coffee as you would javascript. Simply put, Write coffee and place it in app/coffeescripts and Barista will automatically serve it as if it was placed in public/javascripts.

Bundler Bundler is a tool that manages gem dependencies for your ruby application. It takes a gem manifest file and is able to fetch, download, and install the gems and all child dependencies specified in this manifest. It can manage any update to the gem manifest file and update the bundled gems accordingly. It also lets you run any ruby code in context of the bundled gem environment.

Busted Busted is a tool for gathering and reporting information about a broken gem.

CSS-parser Load, parse and cascade CSS rule sets in Ruby.

CSSPool CSSPool is a CSS parser. CSSPool provides a SAC interface for parsing CSS as well as a document oriented interface for parsing CSS.

Cache Money A Write-Through Cacheing Library for ActiveRecord.

Cachy Caching library to simplify and organize caching.

• I18n (seperate caches by locale / expires all locales)
• Generation based (your able expire all caches of one type)
• Simultanouse caching (handle multiple processes trying to write same expensive cache at once)
• Dependent caches (x caches result of cache z+y -> z changes -> x changes)
• Hashed keys (optional -> short/unreadable)
• Global cache_version (expire everything Cachy cached, but not e.g. sessions)
• works out of the box with Rails
• works with pure Memcache and Moneta(-> Tokyo Cabinet / CouchDB / S3 / Berkeley DB / DataMapper / Memory store)

Calendar Maker Rails plugin to build a simple calendar scaffold, with events signified by class names added to the day. Putting a calendar on a web page is easy now. Also, you can add events to a calendar, which are denoted by adding a custom class name to that day, allowing you to style it differently, or even define behavior for that day via unobtrusive Javascript.

Cancan CanCan is an authorization solution for Ruby on Rails. This restricts what a given user is allowed to access throughout the application. It is completely decoupled from any role based implementation and focuses on keeping permission logic in a single location (the Ability class) so it is not duplicated across controllers, views, and database queries. This assumes you already have authentication (such as Authlogic or Devise) that provides a current_user method which CanCan relies on. See Changing Defaults if you need different behavior.

Capybara Capybara aims to simplify the process of integration testing Rack applications, such as Rails, Sinatra or Merb. It is inspired by and aims to replace Webrat as a DSL for interacting with a webapplication. It is agnostic about the driver running your tests and currently comes bundled with rack-test, Culerity, Celerity and Selenium support built in.