These days many operating systems are releasing new versions. The most popular is Windows 7, but also some Linux distros are almost ready to go. While Google is working hard in Android and his Google OS, and nokia will surprise us with Maemo for mobile devices.

Looking at so impressive variety I wonder, why choose? One way to try all of them and even use them with your favourite applications is virtualization.

This technique is getting popular and not only in a test environment but also in a production on. Running lot of virtualized machines on powerful hardware is getting more and more used in companies for their servers.

Agood choice of hardware virtualization is VirtualBox (virtualization can be performed at several levels). Although not so known as VMware or VirtualPC, it is so reliable as these. And the most important thing is that it is open source, at least the OSE version. Firstly it was developed by Innotek, then Sun bought this and later Oracle bought Sun.

Configure your "fake" computers or even your own network. Play with it, it is like a game.