Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web applications. Works with any Rack-compatible server.

Selenium implements the W3C WebDriver protocol to automate popular browsers. It aims to mimic the behaviour of a real user as it interacts with the application's HTML. It's primarily intended for web application testing, but any web-based task can automated.

Protect against typical web attacks, works with all Rack apps, including Rails

Rack::Test is a small, simple testing API for Rack apps. It can be used on its own or as a reusable starting point for Web frameworks and testing libraries to build on.

Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.

Simple, efficient background processing for Ruby.

Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, Sass, and SCSS.

Capybara is an integration testing tool for rack based web applications. It simulates how a user would interact with a website

A Ruby wrapper for the OAuth 2.0 protocol built with a similar style to the original OAuth spec.

WebMock allows stubbing HTTP requests and setting expectations on HTTP requests.

A generalized Rack framework for multiple-provider authentication.

Simple mime type detection using magic numbers, filenames, and extensions

An authentication library compatible with all Rack-based frameworks

A Ruby framework for rapid API development with great conventions.

RequestStore gives you per-request global storage.

Middleware that will make Rack-based apps CORS compatible. Fork the project here: https://github.com/cyu/rack-cors

raindrops is a real-time stats toolkit to show statistics for Rack HTTP servers. It is designed for preforking servers such as unicorn, but should support any Rack HTTP server on platforms supporting POSIX shared memory. It may also be used as a generic scoreboard for sharing atomic counters across multiple processes.

unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between unicorn and slow clients.

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.

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.