| 1 | 11 | 4 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... |
| 2 | 12 | 24 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... |
| 3 | 80 | 59 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... |
| 4 | 248 | 843 | thin | A thin and fast web server |
| 5 | 445 | 964 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... |
| 6 | 1,158 | 1,038 | rack-contrib | Contributed Rack Middleware and Utilities |
| 7 | 8,246 | 9,733 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... |
| 8 | 9,053 | 14,917 | goliath | Async framework for writing API servers |
| 9 | 10,243 | 17,717 | torquebox | TorqueBox Gem |
| 10 | 10,364 | 10,363 | reel | A Celluloid::IO-powered HTTP server |
| 11 | 12,806 | 11,972 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |