Publish/Subscribe, Request/Reply Messaging API for Java.
Domain-Driven Design sample application
vRules4j--Object Oriented Java Object Validation/Decision Rule engin
Utility classes, APIs and tools for Java
A true Java Only Web Framework
JCA compatible Resource Adapter for SAP
Java client API for accessing the FRED web services
Myth Framework Core Libraries (part of MythSDP)
A Java library to communicate with SAP
Multilingual FAQ and other addons for the Geeklog CMS
https://github.com/sitefusion
A simple web interface for Blender, for rendering animations..