Deploy your Middleman site to Rackspace Cloud Files

Implementation of Edge Side Includes subset for rack

Rack middleware port of Rails's respond_to feature

Rack middleware that abstracts format (extension) away from the path (into env)

OAuth2 Rack Server

HTTP Caching for Rack

Thin's Rack::Adapter::Rails extracted to its own gem

The power of Rake, behind Rack

A Rack middleware that tries to make FB Connect behave a little bit more like other identity providers such as OpenID and OAuth.

Rack middleware for creating faking responses for HTTP web services that an application under test communicates with

Rack middleware to output the state of your request/response headers

A Rack middleware for automatically formatting response body

Rack environment is a rails plugins that lets you define some environments and add some html just after to body tag

Simple Rack Middleware catching exceptions and rendering the error page of your choice

A gem that provides hoptoad notifications from rack

A rack endpoint for adding subscribers to an email list

A port of has_global_session to Rack middleware.

Rack middleware for profiling

Racklet

Gem for overwriting outputting JSON formatted access logs from Rack apps