ruby-celluloid-io 0.15.0-2 (amd64 binary) in ubuntu vivid

 Celluloid::IO provides an event-driven IO system and sockets useful
 for building fast and scalable network applications that integrates
 directly with the Celluloid actor library, making it easy to combine
 both threaded and evented concepts.
 .
 Celluloid::IO is ideal for implementing services which handle large
 numbers of mostly-idle connections, such as Websocket servers or
 chat/messaging systems.