If you're looking for a useless application you're in the wrong place, I listed only the most useful applications that you can find for free on the net.
Do you think that Mac OS exposè is a good way to have a look on your crowded desktop? With this tool you get an easily customizable exposè like application with some extra feature you will be glad to discover.
When you run on battery is important to save as much power as possible. One way to do this is to set your CPU working frequency and voltage.
Since you're reading this post I suppose that you've got so much ID and password to keep in mind. Usually this isn't so easy nor so effective (you're like to select always the same password).
You'd better save your passwords on a encrypted file and remember only its password.
Do you think that IE should have a download manager, a tab history, ad-blocker and a more user friendly way to change proxy? Install IE7 pro and you'll find this feature (and many others) coming on your browser!
Did I forget something?