Amq-client is a fully-featured, low-level amqp 0.9.1 client with pluggable networking i/o adapters. it comes with adapters for eventmachine, cool.io, eventpanda and so on and is supposed to back more opinionated amqp clients such as ruby-amqp or be used directly in cases when access to more advanced amqp 0.9.1 features is more important that convenient apis