| 1 | 10 | 9 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... |
| 2 | 11 | 17 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... |
| 3 | 81 | 63 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... |
| 4 | 246 | 697 | thin | A thin and fast web server |
| 5 | 436 | 931 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... |
| 6 | 1,158 | 828 | rack-contrib | Contributed Rack Middleware and Utilities |
| 7 | 8,092 | 8,469 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... |
| 8 | 8,927 | 11,246 | goliath | Async framework for writing API servers |
| 9 | 10,194 | 28,569 | torquebox | TorqueBox Gem |
| 10 | 10,336 | 10,100 | reel | A Celluloid::IO-powered HTTP server |
| 11 | 12,792 | 9,374 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |