If your a user of the cross-platform (Windows, OSX, Linux) virtualization software Virtual Box, you’ll be happy to find the VirtualBox VDI Index. While you’re there you’ll find hundreds of preconfigured virtual appliances available for free download. This looks to me like it’s the mother lode of virtualization software and even if you don’t know much about it currently or have a need for it, I would suggest bookmarking this page for future reference in case the day comes when you do. Virtualization and virtual appliances are becoming more relevant as time goes on; this virtualizer is targeted at server, desktop and embedded use.