rack-metrics is a performance monitoring tool.

rack-oidc-api provides a JWT validation middleware which automatically discovers the settings supported by a given OIDC provider, and validates the token against the published keys.

Live broadcast on app showing fire and blood everywhere? Image hosting site flooded with pornography? Or some other urgent reason to take your app offline in a hurry? rack-killswitch to the rescue.

This gem is deprecated - see rack-tail

rack-auth-nginx_omniauth_adapter works with NginxOmniauthAdapter

rack-relativize relativize path of html ( href, src attribute) and css ( url(..) ).

Rack-Rscript is a light-weight alternative to Sinatra-Rscript.

rack-smusher uses the smusher gem to compress your images dinamically

rack-weinre inserts a script tag that loads a weinre target js into html files.

Flash hash implementation for Rack apps.

Lean and simple host redirection via Rack middleware

Declaratively filter data via URL params, in any Rack app.

Web page speed optimizations at the Rack level

Rack middleware for rblineprof (github.com/tmm1/rblineprof)

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

A Rack endpoint that generates cache manifests and other useful HTML5 offline utilities that are useful on the server-side. Rack::Offline also provides a conventional Rails endpoint (Rails::Offline) that configures Rack::Offline using expected Rails settings

If you are creating Rack middleware that changes the HTML response, use Rack::Mason to get a head start. Rack::Mason takes care of the boilerplate Rack glue so that you can focus on simply changing the HTML. Notethis is a fork from https://github.com/techiferous/rack-mason (c) techiferous@gmail.com

Rack::URISanitizer is a Rack middleware which cleans up trailing % characters in request URI.

This Rack middleware records incoming Rack request and responses in a VCR compatible format.

Rack middleware Captcha verification using Recaptcha API.