There are screen savers a plenty to choose from but what do they actually do? Not a lot except to look pretty. Heres a screen saver that serves a useful purpose as well!
This clever little application turns your computer into a call display unit. Customize it with your favorite background image. You can also choose to have it play a sound when a call comes in. The number display window can de dragged to any part of your desktop.
Quick Fact: What is Call Display
Call Display is a telephone company service. It provides the identification information of persons calling your telephone number. The Call Display information is supplied by the telephone company between the first and second ring as a series of special codes. The information includes the time and date of the call, the telephone number of the caller, and, in some areas, even callers name.
fonXL Call Display Screen Saver uses this Call Display information to provide with detailed information on your incoming calls. Without Call Display from your telephone company the screen saver cannot determine the telephone number of incoming calls.


Features
The Call Display Screen Saver* displays:
callers name - if connected to the Internet you can click on the callers name and be redirected to Infospace.com for more information. (currently works for US and Canada phone numbers only!)
callers phone number - to return the call click on the number - a pop-up window appears with the number dialed - once the number is dialed you should click on the release button to complete the call.
the time the call was received
current time
Scroll through the list of callers by left-clicking on anywhere on the screen - the number will display for 4 seconds and then move to the next one. Right-click to scroll back. The Left/Right arrows also perform the same function.

Click on X or the Esc key to exit the screensaver

* Requires caller I.D. service from your telephone company.