Sun has posted the second release candidate of the NetBeans Integrated Development Environment (IDE) 4.1. This early access release is available for Windows, Linux, Mac OS X, and Solaris. New features in version 4.1 focus on Enterprise JavaBeans and Web Services. Final release is possibly later this month. Java 1.4.2 or later is required.
The Gnu Project has released version 0.15 of GNU Classpath, an incomplete free implementation of the core Java class libraries. This release mostly improves performance and fixes bugs. Since this is a clean room project, it doens't always line up exactly with any particular Java version, but it's roughly at the level of Java 1.4 with a few missing pieces. GNU Classpath is published under the GPL with library exception.
Websina has released BugZero 4.0.2, a $1299 payware (+$300 for maintenance) Web-based bug tracking system that supports multiple projects, group-based access, automatic bug assignment, file attachment, email notification, and metric reports. Bug Zero is written in Java and can run on top of various backend databases including MySQL. 4.0.2 fixes bugs and makes the size limit for uploaded files configurable.