Rack::RequestID is a Rack middleware for generating request IDs. It generates a request GUID for every request (if one was not already provided) and inserts the request ID as a response header.

Replicate or record HTTP requests to your Rack application and replay them elsewhere or at another time.

Rescue Handler for Rack

This midleware allows an application to support multiple versions of a RESTful API following the best RESTful practices to encode the version information in the HTTP request. It's inspired by this article: http://barelyenough.org/blog/2008/05/versioning-rest-web-services/.

Implements support of RESTful resources with Rails MVC when Javascript is off and bulk operations are required with multiple submit buttons.

Adds an extra X-REVISION header with source code revision string (git, svn, etc)

Serve static files from S3 via Rack

Security related HTTP headers for Rack applications

Rack session store for MongoDB

Rack session store for Sequel

Slightly smarter session cookies for Rack 2 apps

Simple Rack middleware which detect the request comes from smartphone

Not much to explain. Not a lot of code, but wanted it packaged up for easy use/deployment.

Rack middleware for building multi-protocol streaming rack endpoints

Rack middleware to remove cookies at user-defined paths.

Rack::TestApp is another testing helper library for Rack application. IMO it is more intuitive than Rack::Test.

Allow web service clients to specify the request time zone in an HTTP header.

Rack middleware for using the Authorization header with token authentication

Rack Middleware for logging raw incoming/outgoing HTTP traffic

rack middleware to serve static files with specified patterns. Check out http://gmarik.info/blog/2010/05/10/blogging-with-jekyll-and-heroku-for-free for more...