System Profiler

This application doesn't actually do anything. It's extremely useful however, because it shows you all the information about your trusty computer. It's shows you everything you need to know and I mean EVERYTHING!

Sometimes you're shopping for stuff and need to know what parameters to meet. Maybe you're getting a crazy program and need to know if your computer is good enough to handle it. Maybe you just wanna show off or something.

This application will show you all the information about the computer including stuff like your graphics card, network settings, what applications you have installed and so on.

You might find your compy needs some updating. I found a blog with 20 tips on speeding up your mac. You'll definitely want to use system profiler here, not only to find out what you have currently, but also if your newly installed memory is being recognized, for example.

It can really come in handy.