| 1 | 9 | 23 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... | 
        | 2 | 11 | 6 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... | 
        | 3 | 83 | 82 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... | 
        | 4 | 220 | 1,129 | thin | A thin and fast web server | 
        | 5 | 404 | 1,022 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... | 
        | 6 | 1,174 | 1,186 | rack-contrib | Contributed Rack Middleware and Utilities | 
        | 7 | 7,987 | 9,190 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... | 
        | 8 | 8,508 | 15,765 | goliath | Async framework for writing API servers | 
        | 9 | 9,639 | 17,590 | torquebox | TorqueBox Gem | 
        | 10 | 9,871 | 12,627 | reel | A Celluloid::IO-powered HTTP server | 
        | 11 | 12,630 | 9,364 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |