Apache Axis2 is a complete re-design and re-write of the widely used Apache Axis SOAP stack to build on the lessons learnt from Apache Axis.
Apache Axis2 not only supports SOAP 1.1 and SOAP 1.2, but it also has integrated support for the widely popular REST style of Web services: the same business logic implementation can offer both a WS- style interface as well as a REST style interface simultaneously.
Apache Axis2 is more efficient, more modular and more XML-oriented than the older version. It is carefully designed to support the easy addition of plug-in "modules" that extend its functionality for features such as security and reliability. Modules currently available or under development include:
WS-ReliableMessaging - Supported by Apache Sandesha2
WS-Coordination and WS-AtomicTransaction - Supported by Apache Kandula2
WS-Security - Supported by Apache Rampart
WS-Addressing - Module included as part of Axis2 core
Apache Axis2 is built on Apache Axiom, a new high performant, pull-based XML object model that was released two days ago.