The Rack Fast Escape library, by The Rubyists, LLC

A rack utility that will create and save images (pngs) for a part of your web page's current dom. These images become available as public '.png' resources in the rack application. Currently shutterbug supports HTML, SVG and Canvas elements.

Logtail integration for Rack

Smoggy Rackspace API

Escher authorization for rack based http servers with ease in a form of middleware

A web console for Rack apps.

Rack middleware for thrift services

Small rack middleware to block your site from unwanted vistors. A little bit more convenient than basic auth - browser will ask you once for the password and then set a cookie to remember you - unlike the http basic auth it wont prompt you all the time.

Handle race conditions in Rails JS feature tests caused by outstanding overlapping actions in your app, with rack middleware to let you wait for pending feature test actions to finish

Rack hook which fires after the socket to the client is closed.

RackStep is (yet another) micro ruby framework for web development.

Timber integration for Rack

Rack middleware for processing SSI based on the nginx HttpSsiModule. Directives currently supported: 'block' and 'include'

A Test Kitchen Rackspace driver

Rack middleware for rate-limiting incoming HTTP requests.

A gem to extend knife-rackspace allowing cloud load balancer management.

Rack Upload handler with Nginx Upload Module support

Rack::Timeout enhancements for Rails

Trinidad allows you to run Rails or Rack applications within an embedded Apache Tomcat container. Serves your requests with the elegance of a cat !

Spellcheck your text entry with TinyMCE and Rack SpellChecker