Simple Rack middleware to log the heroku request id and write it to the end of html requests. Both optionally, of course.

Provides interfaces to Redis hashes that act like Ruby hashes. Rack/Rails caching and sessions too!

a modular Ruby webserver interface

This is a Rack endpoint that provides Flickr authentication. Basically it is a lightweight alternative to the "omniauth-flickr" gem.

Handle Fitbit subscription notifications within a Rails or Rack app, and pass them on via ActiveSupport::Notifications.

Creates rax clusters

Listen to your app.

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...

Leech is simple TCP client/server framework. Server is similar to rack. It allows to define own handlers for received text commands.

Rack app that mounts in Rails projects to expose management endpoints for BARD Tracker

Check if wa are in production. It uses several metrics: - Does a $RAILS_ENV environment variable exist? Does it say 'production'? - Does a $RACK_ENV environment variable exist? Does it say 'production'? - Failing the above, are we on the Git "master" branch?

High performance Rack server for Opal and Ruby

Applies a source prefix to any custom source names supplied when submitting metrics

This GEM provides a small, barebones framework for creating MVC Rack applications.

A collection of easily plugable rack authentication middlewares

Rack based domain switcher with configuration

A doorman for your Rack application. Checks if REMOTE_USER matches the subdomain. Requires some authentication means to set REMOTE_USER.

Simple Docker Orchestration

Rack middleware to output a bar showing environment

A rack middleware layer that logs the full request cycle.