| 1 | 10 | 3 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... |
| 2 | 12 | 20 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... |
| 3 | 79 | 93 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... |
| 4 | 265 | 967 | thin | A thin and fast web server |
| 5 | 462 | 1,020 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... |
| 6 | 1,150 | 1,054 | rack-contrib | Contributed Rack Middleware and Utilities |
| 7 | 8,255 | 7,312 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... |
| 8 | 9,234 | 13,032 | goliath | Async framework for writing API servers |
| 9 | 10,409 | 15,290 | torquebox | TorqueBox Gem |
| 10 | 10,438 | 10,653 | reel | A Celluloid::IO-powered HTTP server |
| 11 | 12,792 | 11,438 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |
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