There's a high-level client written in node.js that connects Apache Kafka projects to Apache Zookeeper.  Here is a link to the project page.

Kafka is an interesting distributed publish-subscribe messaging system developed by LinkedIn

Zookeeper is a project that provides services for large distributed systems such as configuration, synchronization, and name registry.

And don't forget about another technology in the mix for this library: Prozess, which is a Kafka client library enabling low-level access from node-kafka-zookeeper.

You should definitely look into this if you're doing work on heavily distributed systems