Unless an application tells me about an available upgrade, I tend not to visit vendors websites regularly to check for updates and so have been running a number of applications which where slightly outdated. I suggest to any Mac owner to download the free AppFresh application - as it takes the pain out of keeping all your applications up-to-date. It searches for all applications installed on your machine, and checks the version number to those found on iUseThis.com. If a new version is identified, you can tell the program to try and automatically download and install the relevant update file.

A great little timesaver, and very useful for making sure your applications are working best with Snow Leopard.

metaquark » AppFresh.