You can test if sender of request has intelligence.

Rack Middleware for validating twilio request signatures

rack middleware to add u2f authentication to a rack app. Includes registration.

Strips urls from anchors and forms to essentially create an html page that doesn't like anywhere

Rack middleware to modify Unicorn's procline to display request method, path and uuid during the request.

Rack::Usermanual allows you to serve your gherkin feature files as web pages within your application.

A rack middleware that searches for UTM tags in the request params, and stores them in cookies for later use.

provides a method for debugging like var_dump() of php.

Rack middleware to aid with parsing vendor accept headers

WebDAV handler for Rack (dav4rack based)

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

Simple gem to load rack middleware only in certain environments.

Rack middleware for generating xapfiles that know about the DLR

Rack middleware that puts revision id into response headers

Rack middleware that adds X-Robots-Tag header.

Allows you to know from which server the response originated from.

CLI Backend with Rack

Use Hevents (https://github.com/yarmand/hevents) to create JS init function for Rails controllers and views. Provide helper to setup handlers in your Rails code

Ruby Adapted CUDA

Rails Application Configuration for Yield Main