This gem uses Rack middleware and the Rails 3 Notification API to display page load time and amount of queries executed.

Store ginormous files on S3 or the Rackspace Cloud using this gem.

Sunshine is a framework for rack and rails application deployment. This gem was made possible by the sponsoring of YP.com (http://yp.com).

Flexible Swagger documentation for Rack and Grape

Sworn is Rack middleware to handle OAuth 1.0a signed requests

Synfeld is a web application framework that does practically nothing. Synfeld is little more than a small wrapper for Rack::Mount (see http://github.com/josh/rack-mount). If you want a web framework that is mostly just going to serve up json blobs, and occasionally serve up some simple content (...

Toast is a Rack application that hooks into Ruby on Rails. It exposes ActiveRecord models as a web service (REST API). The main difference from doing that with Ruby on Rails itself is it's DSL that covers all aspects of an API in one single configuration.

Rack middleware that traces every request through all processing layers — controller, ActiveRecord, cache, ActiveJob, and outbound HTTP via Faraday — then emits a flame-graph-style summary to the Rails log. Supports plain-text, ASCII flame-graph, and JSON output; N+1 detection; sampling; path fil...

Rack middleware for unity clients

Rack application security scanner built around the SCNR::Engine.

WardenSkeletonKey is a Rack middleware to automatically log you into your development environment. Saving you seconds and from forgetting those testing passwords. Was it "test123"?

Small router based on RACK

Simple logging library inspired by Rack architecture

a Rack and Git based wiki like thing

Given an RSS feed, make a tumblr-like site out of it. Uses Sinatra & Rack, inspired by Dumble.

Yardmarshal inspects rails, allowing deep inspection of routes, racks, and more

An extremely too-simple web framework based on raw Rack and some helper classes. Scratches a very particular itch--one you likely don't have.

Mounts a Rack app at /ping/? that returns 200 OK for AWS load balancers

A standalone Rack Middleware application that authenticates a username/password against a devise-powered backend application before forwarding the original HTTP request to the same application. Authentication is done on *every* request, so it is advisable to use devise-proxy sparingly.

A collection of Rack middleware components for tracking API usage statistics including user agent and IP address data with Redis storage.