IBM's alphaWorks has released Structural Analysis for JavaTM (SA4J), "a technology that analyzes structural dependencies of Java applications in order to measure their stability. It detects structural 'anti-patterns' (suspicious design elements) and provides dependency web browsing for detailed exploration of anti-patterns in the dependency web. SA4J also enables 'what if' analysis in order to assess the impact of change on the functionality of the application; and it offers guidelines for package re-factoring." I'd love to test this out, but currently it's only available for Windows. Linux and mac OS X binaries are promised shortly.
Linus Tolke has posted ArgoUML 0.15.4, an open source UML modelling tool written in Java. ArgoUML is published under a BSD license.
David Koelle has changed the license of his JFugue music library so it's now available for commercial use.