| 1 | 10 | 7 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... |
| 2 | 11 | 20 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... |
| 3 | 81 | 69 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... |
| 4 | 246 | 844 | thin | A thin and fast web server |
| 5 | 436 | 860 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... |
| 6 | 1,159 | 876 | rack-contrib | Contributed Rack Middleware and Utilities |
| 7 | 8,094 | 8,882 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... |
| 8 | 8,927 | 12,454 | goliath | Async framework for writing API servers |
| 9 | 10,195 | 22,260 | torquebox | TorqueBox Gem |
| 10 | 10,338 | 12,015 | reel | A Celluloid::IO-powered HTTP server |
| 11 | 12,789 | 13,878 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |