BeanShell is a small, free, embeddable Java source interpreter with object scripting language features, written in Java. BeanShell dynamically executes standard Java syntax and extends it with common scripting conveniences such as loose types, commands, and method closures like those in Perl and JavaScript.

Implementation for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage generation. It has a plugin architecture that makes it extensible and supports asynchronous logging based on LMAX Disruptor.

Spring Context provides access to configured objects like a registry (a context). It inherits its features from Spring Beans and adds support for internationalization, event propagation, resource loading, and the transparent creation of contexts.

TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities that make it more powerful and easier to use. It supports test configured by annotations, data-driven testing, parametric tests, etc.

This plugin contains various small independent goals to assist with Maven build lifecycle

Free Java Reporting Library

JMock is a testing framework for Java that allows you to create mock objects.

The Enterprise Security API (ESAPI) project is an OWASP project to create simple strong security controls for every web platform. Security controls are not simple to build.

A parsing and analyzing library to get information from a useragent string.

The Apache Log4j Implementation Tests

The ZKoss Common Library