A rack application working as an adapter for Mongoid

Send monitoring info to OpenTSDB

A rack endpoint for adding subscribers to an email list

Provides a simple router & dispatcher for Rack.

A Rack middleware to publish directries containing media files as podcast

Multiplex multiple rack servers to the same app.

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.