HornetQ - another JMS implementation from Jboss

HornetQ - putting the buzz in messaging - JBoss Community

HornetQ is an open source project to build a multi-protocol, embeddable, very high performance, clustered, asynchronous messaging system.

Why should I use HornetQ?

JMS and above - HornetQ supports the JMS 1.1 API
and also defines its own messaging API for maximum performance and
flexibility. Other protocols are planned for upcoming releases.

Superb performance
- HornetQ class-beating high performance journal provides persistent
messaging performance at rates normally seen for non-persistent
messaging. Non-persistent messaging performance rocks the boat too.

POJO-based design - HornetQ has been designed using POJO and minimal third-party dependencies. You choose how you want to use HornetQ: run it stand-alone, integrate it with JBoss Application Server or another Java server/container or embed it directly inside your own product.

Solid high availability
- HornetQ offers server replication and automatic client failover to
eliminate lost or duplicated messages in case of server failure.

Flexible clustering
- Create clusters of HornetQ servers that know how to load balance
messages. Link geographically distributed clusters over unreliable
connections to form a global network. Configure routing of messages in
a highly flexible way. Adapt HornetQ to your network topology, not the
other way round.

Management - HornetQ provides
a comprehensive management API to manage & monitor servers. It is
integrated seamlessly to the servers to work in a HA environment.