You may have tried the clock screensaver, Bing screensaver or even the weather forecast screensaver, but how’s about something different and useful like the Wikipedia screensaver?
When your desktop is inactive, the Wikipedia screensaver will load a random page from Wikipedia and display it as a screensaver on a regular interval.
By default, the next random page from Wikipedia will load every 60 seconds. If you want to, you can configure the time delay between each page load in the Settings window.
Also, you can configure the screensaver to automatically kill IE and Firefox browsers on activation. Plus, this screensaver can be configured to kill any other program on activation and you can set to blank the screen completely after a configurable time.
This is how the screensaver should look like in your desktop.
Wikipedia screensaver requires the Microsoft .NET Framework 1.1 or later. It works perfectly on Windows 7, Vista and XP. Available as free download.