Safe Download Version
... Snow Leopard users that installed Apple's Security Update 2011-003 can get daily safe file updates Safari uses to help make sure malware doesn't find its way onto their Macs. Apple doesn't, however, offer an easy way to tell when your definitions list was last updated, or what list version number is installed, so The Mac Observer whipped up Safe Download Version to handle that task for you.
Safe Download Version is a Mac OS X application that shows which safe downloads definition list version is installed, along with the date and time the definition list was last updated on your computer. The brand new version 0.4.1 update added the ability to manually update to the latest version of Apple's definitions list.