Rack::Health is a health check interface for rack applications.

Lean and simple host redirection via Rack middleware

Rack middleware for rblineprof (github.com/tmm1/rblineprof)

Web page speed optimizations at the Rack level

Declaratively filter data via URL params, in any Rack app.

High Performance and Optimized Preforked Rack Handler

A light-weight Sinatra-inspired web framework for web sites and applications of any size.

SproutCore is a platform for building native look-and-feel applications on the web. This Ruby library includes a copy of the SproutCore JavaScript framework as well as a Ruby-based build system called Abbot.

Stubb is the second mate.

vmpooler provides configurable pools of instantly-available (running) virtual machines

Tools to help you develop Zendesk Apps.

A web server that can be spawned in any directory

Aptible CLI

Makes middleware that ships with Rack bullet-proof for async responses.

Standalone rack app to manage files onbehalf of your app

Rurema is a Japanese ruby documentation project, and bitclust is a rurema document processor.

Serves an ElasticGraph application using Rack.

A set of adapters providing easy access to the GDS GOV.UK APIs

Tiny health check of Rack apps like Rails, Sinatra for use with uptime checking systems like Kubernetes, Docker or Uptimerobot

Supports JSON content, custom HTTP headers, and post-processing of extracted content.