It supports a multitude of integration technologies including standard JBI (Java Business Integration), XML with support for XML Schemas, WSDL, and BPEL with the aim of simplicity, efficiency, long-term durability, and low TCO (Total Cost of Ownership).
Even if development and support are mainly focused on Glassfish V2 and V3 platforms, beta projects on JBoss and standalone JVM work well and are in progress (2012 Q2).
Similarly, build, deploy, un-deploy, run, test and debug tasks are managed by graphical tools.
So, its memory footprint is very low (less than 300 Mo) and allows OpenESB to run in a Raspberry PI or in a many instances on a cloud.
The table below lists the web sites and forum managed by OpenESB community Java Business Integration JBI specification