Rack Middle to creating static copies of rendered endpoints and reload them. It equates to a static file cache with other possible uses. See rubyops.net/gems/rack-hard-copy for details.

Hashed cookie-based session store for Rack

Rack Middleware for Hatena star.

Rack Middleware for overriding and adding additional HTTP response headers

Can be used e.g. to set CORS headers or selective caching of resources

Rack Middleware for authenticating requests via an http header

The goal of this gem is to avoid depending on potentially forgeable headers down the line by configuring the deploy target properly. Forks https://github.com/pusher/rack-headers_filter to allow more configuration options when initializing the headers. Personally disagree with th...

Rack health check middleware.

A simple Rack middleware to health check

A health Endpoint

Rack middleware for Heroku

rack middleware for exposing Heroku environment variables

Rack middleware for checking the process commit hash on Heroku

Rack Middleware for syntax highlighting.

Includes the X-Clacks-Overhead header inside your rack application. http://redd.it/2yt9j6

A gem that provides hoptoad notifications from rack

Simple Rack wrapper around HoptoadNotifier.notify

Rack middleware to 404 requests that aren't to whitelisted hostnames

HTML Tidy.

Just use Rack::HTTPCat in your application for all requests to have a link to the https://http.cat for their status under the HTTP-Cat header.