In version 5.0 the authors of the popular Ruby web server Puma chose to remove the daemonization support from Puma, because the code wasn't wall maintained, and because other and better options exist for production deployments. For example systemd, Docker/Kubernetes, Heroku, etc. Having said ...

Rack::Brotli enables Google's Brotli compression on HTTP responses

Rack::Debug is a middleware that provides a simple interface to ruby-debug. Helps debug apps running in Passenger.

Rack::Debug adds a middlerware interface to ruby-debug http://github.com/github/rack-debug

A Rack middleware for providing JSON-P support.

JSON Schema based Rack middlewares

Rack middleware that provides authentication based on JSON Web Tokens.

Rack-P3p is rack middleware for inserting P3P headers into apps. This will allow your application to serve cookies to IE when in an iframe. It will also pull off the cookie on 304 responses, since IE does not like the cookie then.

SpeedTracer middleware for server side debugging

Rack OpenTracing middleware

Failover for ActiveRecord and Redis

Configuration management library for Ruby applications.

Middleware for logging requests to Readme's metrics API

Rack adapter for Reel

RestClient on steroids ! Easily add one or more Rack middleware around RestClient to add functionalities such as transparent caching (Rack::Cache), transparent logging, etc.

Ronn-NG builds manuals in Unix man page and HTML format from Markdown. Ronn-NG is a modern, maintained fork of the original Ronn.

roy is a small library which allows every Ruby object to be used as a Rack application.

Rugalytics is a Ruby API for Google Analytics.

Serif is a static site generator and blogging system powered by markdown files and an optional admin interface complete with drag-and-drop image uploading.

Recurring / Periodic / Scheduled / Cron job extension for Sidekiq