| 1 | 10 | 4 | concurrent-ruby | Modern concurrency tools including agents, futures, promises, thread pools, actors, sup... |
| 2 | 12 | 8 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... |
| 3 | 79 | 72 | puma | Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server
for Ruby/Ra... |
| 4 | 266 | 590 | thin | A thin and fast web server |
| 5 | 462 | 1,410 | unicorn | unicorn is an HTTP server for Rack applications designed to only serve
fast clients on ... |
| 6 | 1,150 | 982 | rack-contrib | Contributed Rack Middleware and Utilities |
| 7 | 8,257 | 6,189 | iodine | A fast HTTP / Websocket Server with built-in Pub/Sub support (with or without Redis), s... |
| 8 | 9,236 | 13,642 | goliath | Async framework for writing API servers |
| 9 | 10,408 | 11,787 | torquebox | TorqueBox Gem |
| 10 | 10,439 | 9,341 | reel | A Celluloid::IO-powered HTTP server |
| 11 | 12,795 | 8,792 | sequenceserver | SequenceServer lets you rapidly set up a BLAST+ server with an intuitive
user interface... |
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