SVNKit is a pure Java Subversion (SVN) client library. This means that users of the library (i.e. Java applications) do not have to include svn native binaries or javahl bindings to work with subversion repositories. It is not only a 100% Java replacement for javahl bindings, but also a library that provides a high level of control over subversion repository operations.
Clover is a Java code coverage analysis tool. Key features include per-test code coverage, test optimization (aka selective testing), interactive and historical HTML reporting, IDE integration with Eclipse, IntelliJ IDEA, RAD, and NetBeans. It also works with Ant, Maven, and other command line tools.
Qmonix is a quantitative software monitoring and analysis SDK. It allows you to build your own analytics infrastructure by monitoring and analyzing events from any platform that supports HTTP, visualize your data in real time in the provided Web interface or query with the HTTP API, embed charts in your Web sites, or export data for further analysis.