Some open-source software I’ve created which you may find useful:

jvix is a Java wrapper around the VMWare VIX API.
It allows you to stop and start virtual machines within a VMware hypervisor, as well as perform other maintenance tasks.

p7spy is a
JDBC driver for use by developers to help investigate and profile commands being sent to a database from a Java application. It doesn’t use AOP.

vmaint is a set of scripts for developing on and maintaining virtual machines.