a rack app that serves a XMLRPC::BasicServer

Goliath is a fabulous framework for writing rack based web applications. With this gem, you can also use it to write web proxies in rack style.

Rack middlware to render single page apps (or any html page with javascript) with phantomjs and return plain html for bots.

Simple piece of rack middleware to track stats

Zbatery is an HTTP server for Rack applications on systems that either do not support fork(), or have no memory (nor need) to run the master/worker model. It is based on Rainbows! (which is based on Unicorn (which is based on Mongrel)) and inherits parts of each. Zbatery supports your choice of ...

rackdapter

This gem provides a simple and flexible rate limiting mechanism for Rack applications. It allows you to control the rate at which requests are processed, preventing abuse and ensuring fair usage.

A Rack middleware for automatically formatting response body

HTTP Caching for Rack

RackTest driver for Capybara, but with remote request support thanks to mechanize

Sitepress rack app for stand-alone of embedded usage.

Garner is a cache layer for Ruby and Rack applications, supporting model and instance binding and hierarchical invalidation.

Glue to allow mounted rack applications to know where they're mounted

A Rack application for serving static sites with ERB templates.

Itsi Server - A light-weight Rack Server implementation for Ruby

A minimalistic microframework built on top of rack

WebDAV handler for Rack

Checks that application's database, sidekiq etc are responding.

Refresh ActiveRecord connection on each rack request.

Convert a Rack app into a static HTML site.