Time traveling each request for rack applications.

Measure time spent in your Rack middlewares

Middleware that will insert a timestamp within the Rack environment.

You can be a Time Traveler.

Adding ability to detect timezone at UI side and get it within Rack/Rails via cookies with/o custom handler.

Include and depend on third-party JS (and CSS) libraries

Gemify jQuery for Rack

A bunch of rack middlewares to enforce secure cookies and add HSTS (Strict Transport Security) and HPKP (Public Key Pinning) headers to your Rack application.

Identify and prevent tor users to access a Rack / Rails application.

The Rack::TradeTracker gem is for use with the Trade Tracker affiliate network. The gem provides a Rack middleware component to handle Trade Tracker's redirect mechanism.

Rack::Transform is a middleware that attemps to make a compatibility layer between two different request/responses that should hit the same endpoint.

Rack middleware; truncates error body

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...

The Recontributed Rack Middleware

Automatic port forwading via SSH tunneling.

Rack Middleware for validating twilio request signatures

Rack Middleware for OAuth Authorization and Authentication via/twitter

Rack middleware to automatically include your Typekit JavaScript files

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

Elegant workflow for Rack::Auth::Basic