What are the differences between those amqp client libraries? Which one is the most recommended? What are the major differences?
I'm the guy that wrote the bramqp library. So I'm going to admit from the start I may be a bit biased. :P
In my opinion, as long as you know the spec, bramqp should work fine. Otherwise, use amqp.node
The following are the amqp libraries available for node.js.
amqplib / amqp.node - promise style, still updated, looks pretty stable and easy
bramqp - provides a full low level access to AMQP functions, not recommended for starting out
amqp-coffee - coffeescript implementation similar to amqp/node-amqp
amqp / node-amqp - popular, fixed API, not updated as often, a few odd bugs, stable but limited
The following libraries use one of the previous libraries, while providing an easier to use interface or adding features
rabbit.js uses amqplib/amqp.node
wascally uses amqplib/amqp.node
amq uses amqplib/amqp.node
amqpea uses bramqp
easy-amqp uses amqp/node-amqp
rabbus uses wascally
I am also going to add node-amqp10 separately, as it can connect to amqp 1.0 servers.
If there are any more that I should add, just let me know.