Note: This review addresses v5.10.30 of the software.
Here's a chance to dress up your PC, and do some good for science as well. This screensaver takes idle cycles on your PC and uses them to perform processing for a variety of scientific projects. You'll be able to choose and switch among numerous projects, including those to control malaria, search for extra terrestrial life in the universe, help with medical research, and many others.
As your PC goes about its scientific work, it displays a screensaver showing exactly what it's doing, including charts, graphs, and data, rotating in space. Will you understand the charts and graphs? Most likely not. But they're certainly cool-looking, and you get the satisfaction of knowing you're helping science progress.
Note: This link takes you to the developer's site, where you can download the latest version of the software.