JWare/AntXtras is a powerful extension Ant library as well as a collection of useful Ant components. The current active AntXtras projects include "AntXtras", "Log4Ant", and "Svn4Ant".
Ant WebUI is an AJAX web-based interface for launching and scheduling Ant tasks, thus making it a powerful replacement to the regular cron tasks. Makes server administration easier and allows a wide range of applications.
JMX4Ant provides the ability to interact with JMX MBeans from Ant. Supports several popular JMX implementations and J2EE servers including JBoss and BEA WebLogic Server.