Change your Windows desktop background automatically

Download Wallpaper Juggler

Let the software download wallpapers, or download from hiren.info, wallpaperstock.net, interfacelift.com

Other wallpaper sites: Social Wallpapering

Research papers online

Economics,

RePEc

EconPapers

National Bureau of Economic Research

Application Launchers

QuickSilver, granddaddy on Mac

Windows launchers:

DoMercury

SkyLight

WinSilver

Launchy

Auto parts online/Aftermarket

http://www.car-part.com/

http://www.rockauto.com/

http://www.buick-autoparts.com/

http://www.oreillyauto.com/

http://www.autozone.com/

http://www.advanceautoparts.com/

http://www.cskauto.com/

http://www.napaonline.com/

People Search on the Web

http://pipl.com/

http://www.123people.com/