With Thumbstacks.com, you can make presentations - like slideshows, or outlines - right in your web browser. When you're done, you can share your presentations with anyone, anywhere, just by sending them a link.
Desktop Earth is a wallpaper generator for Windows. It runs whenever you're logged on and updates your wallpaper with an accurate representation of the Earth as it would be seen from space at that precise moment.
I. Guy, M. Jacovi, A. Perer, I. Ronen, and E. Uziel. CSCW '10: Proceedings of the 2010 ACM conference on Computer supported cooperative work, page 41--50. New York, NY, USA, ACM, (2010)