Sun has just acquired innotek: "Europe's leading high-tech software company specializing in PC virtualization technology and operating system design."

You can check out innotek's VirtualBox Open Source Edition at virtualbox.org.

You can also read Sun's announcement, and here's an independent review of the innotek acquisition.

In case you do a web search and run into other innoteks, note that the right one is "http://www.innotek.de/"