With NumPad, you can use your iPhone or iPod Touch as a numeric keypad, an extended keyboard, or to annotate music. If you use a Mac with OS X 10.4 or later, NumPad does not require any additional software on your computer. The app connects easily through Screen Sharing, simply by following the directions found on the app. Windows users will need a VNC Server software like RealVNC.
Once connected, you can use your phone to enter numbers on the handy, iPhone-screen-size keyboard. You also can use the extended keyboard to scroll your mailbox and delete messages, scroll through Web pages, or use on anything else you would normally use an extended keyboard.
The app can be customized to suit your tastes in color: white, silver, or black. For those who work with music, a Sibelius keyboard is also included.
For more info: check the edovia Web site.