Groovy JSR-94 Rule Engine
GlassFish Plugins for IDEs
KuDocs Document Management System
Jamecs is the JAva ManagEd Content System, a full-featured, Open Source Community CMS for the Java(tm) 2 Enterprise Edition Web Environment, combining JDBC-driven content with the flexibility of advanced Java Technologies and a rich, flexible CMF API.
jGallery - Servlet/JSP based photo gallery
HA-JDBC is a JDBC driver proxy that provides light-weight, transparent clustering capability to any underlying JDBC driver.
jASEN is a pure java Anti Spam ENgine combining bayesian-like scanning with intelligent email inspection and classification
jASEN is best suited to developers wishing to integrate anti-spam services into an existing server based java email application, but can be used for client applications
The jASEN project started after the now famous article published by Paul Graham spawned a range of new anti-spam technologies based on Bayesian classification
Subsequent enhancements were made to the original proposal, with a significant improvement proposed by Gary Robinson which replaced the standard Bayesian approach with a superior* Chi Square computation, which was then further improved
Unfortunately almost all of the implementations of these approaches which followed were either commercial, or non-java. Thus jASEN was created to provide a free, extensible, pure java implementation of the wonderful work done by these (and many other) people
Contains modules, add-ons and integration tools for Spring.
Zebra is a java workflow engine with a Apache Turbine sample application.