Qemu Launcher: A Free Frontend
If you need an open-source virtualizing solution, VMware is not really an option. If you are on a KDE system, VirtualBox is the way to go. But, if you are an avid GNOME user and don’t like running Qt apps in your GTK+ environment, then Qemu Launcher is the end-all solution.
Qemu Launcher is exactly what it says it is: a launcher for Qemu. Qemu, for the uninitiated, is an open-source virtualization system. Qemu itself only has a CLI interface, hence this frontend.
The frontend itself seems a little cluttered, however everything is presented in an overall clean fashion.