open_id_authentication provides a thin wrapper around the excellent rack-openid gem.

http accept language handler

A small library useful to Rack-based Ruby applications for obtaining information about the user agent

SideBro is a Rack-mountable alternative to Sidekiq's built-in Web UI, providing the same features with a customizable design.

Library to manage css and js assets in any rack-based framework

A Lightweight Rack-based framework

Deserializes the body of request

Allows you to manage your rackspace hosted mailboxes, eg. create a new mailbox.

A rack-mountable version of the Pin Payments API

Rack-like HTTP client library inspired by Faraday done my way

Convert any rack-capable application to run on Google's App Engine

Health Check Middleware for Rails and Rack-based Applications

simple logger that outputs params, session, and cookies in fancy colors.

Rack-based minimal request router

Prefix any path in your app with something.

Deduce Ingest API

This simple middleware sets anything in the X-#{prefix}-Cookie header to Cookie, and in the response will copy anything in Set-Cookie to X-#{prefix}-Set-Cookie. This can be useful to enable session management where an HTML client is accessing your API, which doesn't fully support cookies. We have...

Forkr is a preforking worker host, shamelessly inspired by unicorn. It exists to easily fork and scale ruby programs which aren't rack-based.

Check for unix domain socket usage

A Rack-based web library with a little magic.