Puma is a simple, fast, threaded, and highly parallel HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly parallel Ruby implementations such as Rubinius and JRuby as well as as providing process worker support...

A modern web server and application server for Ruby, Python and Node.js, optimized for performance, low memory usage and ease of use.

A thin and fast web server

A fast, asynchronous, rack-compatible web server.

A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), static file support and many other features, optimized for Ruby MRI on Linux / BSD / macOS

A fast HTTP server supporting rack.

Trinidad allows you to run Rails or Rack applications within an embedded Apache Tomcat container. Serves your requests with the elegance of a cat !

Hoof is linux variant of pow. It's based on nss, eventmachine and unicorn

Simple, upgradable WebSockets for Thin.

A multi-process web-server written in Ruby 1.9.

A Web Server

A small fast HTTP library and server that runs Rails, Camping, Nitro and Iowa apps.

Ruby-Mongrel2 is a complete Ruby connector for Mongrel2.

unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request a...