AppSnap is a freeware programm for windows which keep your programs up-to-date for you. AppSnap automatically downloads and sets up the latest version of your favorite software hot off the internets. AppSnap is primarily designed for Windows which does not have any decent package manager such as APT and RPM as in the Linux world.
You can scan for applications in various categories, such as Installed, Not Installed, Upgradable, or, if you want to remove programs, Removable.
Another Software Update program is KC Software’s SUMO which stands for Software Update Monitor. Unlike build-in auto update features, SUMo tells you if updates are available before you need to use your software. It’s free at http://www.kcsoftwares.com/?sumo
Nice tool. Another good one is udc.exe (Update Checker) by FileHippo.com