
The WSO2 ESB, with an innovative design, offering one of the highest performance and lowest footprint approaches to implementing a SOA, delivered as a multi-tenant, elastically scaling, metered platform.
Features

Proxy Services
Proxy services facilitate location transparency and provides the means for the integration between various other services, on different formats.

Sequences
Sequence is a collection of mediators attached to perform a given mediation flow in an integration.

Endpoints
Endpoints represent the third party services or other endpoints the ESB is talking to, this configuration allows you to record a set of meta data about the external endpoint apart from it's endpoint reference.