If you are using more than one computer on the same desk simultaneously, such as when using your netbook next to your desktop computer, you will find Synergy a very useful program. It shares the mouse and keyboard of one computer to the rest. The mouse moves from one computer screen to another just by moving it "over the edge" and the keyboard control is switched simultaneously. Synergy uses your existing local area network so you don't need any special hardware either. Here are some screenshots: the first two are from a Windows XP computer (called Mjollnir) that acts as the server, i.e. shares its keyboard and mouse. The final screenshot is from a Windows 7 netbook (called Hummingbird) that acts as a client and can then receive commands from the Windows XP server.