Krysalis Centipede is a project build system based on Apache Ant. Centipede uses pre-packaged modules called “cents” that it downloads and installs automatically. Cents can be used as Ant tasks or easy to use targets.
For example, Forrest is an XML standards oriented project documentation framework based on Apache Cocoon. In order to assist your projects adoption of this powerful documentation generation tool we have packaged it as a cent that will (optionally) be automatically downloaded, installed and used to build project documentation which includes output from other cents such as Javadoc, JDepend, Checkstyle and many others.
Hmm. This sounds like Gentoo/package system/ports system for Java. A very cool idea.