Tweak Your Ubuntu With Ubuntu Tweak
Ubuntu Tweak is a freeware that allows you to easily tweak your Ubuntu by letting you configure hidden settings and you can customize your desktop environment like showing or hiding Computer, Home, Trash or Networks icons, change power or secuity settings on the fly or change the splash screen. You can also use it to quickly adjust settings for GNOME Panel and some more advanced security settings.
Currently, it only works with Ubuntu GNOME desktop, that means it won’t work on Kubuntu, Edubuntu or Xubuntu. The interface is very easy-to-use and I don’t think an Ubuntu beginner like me would have any problems in using it.