Would be useful to enable OpenID authorisation with your Ruby/Rails-based blog, personal website or whatever.

Middleware that communicates impending shutdown to a load balancer via NACKing (negative acking) health checks. Provided you have at least two load-balanced instances, this allows you to shut down or restart an instance without dropping any requests. Your app needs to inform the middleware when it wants to shut down, and the middleware will call back when it's safe to do so.

Basically this gems aim is to strip 127.0.0.1 from REMOTE_ADDR to make Rails think it's a remote request... always...

A Rack middleware that provides an endpoint to start the New Relic agent.

Automatically generate webservice endpoints for Newsstand

Transparently secure your rack application with google. For test rigs etc.

Rack middleware to stop CSS/jQuery animations.

Little rack middleware to insert '<meta name="robots" content="noindex"></head>' into all HTTPS HTML responses for SEO reasons

Rack::NonCache is a rack middleware that disables HTTP browser caching.

A Rack Middleware that fakes a session

OAuth Echo authentication by a rack middleware

Delegates OAuth authentication to other authentication server

Saves objectspace to a key-value store after every request

Use your Rack application on AWS Lambda.

A simple CMS system built on top of sinatra for lighweight but feature rich sites

Rack::Pack is a piece of Rack Middleware that packages and optionally compresses assets such as javascripts and stylesheets into single files. In a development environment, assets will be packaged on each request if there have been changes to the source files. In a production environment, assets will only be packaged one time, and only if there have been changes.

Web page speed optimizations at the Rack level - fork

Sane parameter validation for Rack::Request. Originally written for use with Sansom.

Automatically generate REST APIs for Passbook registration.

Module for caching arbitrary objects / constructs during a request.