A mobile user agent detection Rack middleware. See the README.

File sending for Rack applications.

Duck is similar to Rack, but for the Gemini protocol.

Rack middleware that duplexes HTTP traffic

Simple Rack middleware for forcing SSL on specific subdomains of an application.

Rack middleware replacing responses with relevant pictures of dogs, based on the status code.

A simple way to provide static files using rack

substation on rack

Rack::Attack with common attack vectors such as denial-of-service, repeated failures, malicious strings, etc.

Nano framework to build small and fast server applications based on rack

Simple Rack Compatible Web Server in Ruby

Metrics library for Rack applications using a preforking http server (i.e., Unicorn)

Static Assets Middleware is useful.

A rack middleware health check

Whisky is a micro-framework built upon Rack.

Rack middleware for connecting to WhenAUser

webserver using rack

Zephyre is a web development framework built on Rack. Use Zephyre to build quick websites with ruby.

Rack middleware for your RestPack web apps

Scaleable caching framework with 100% cache coverage, async server instances and sync worker instances supporting rack applications like Rails.