Former Microsoft Tech Evangelist and now PodTech employee Robert Scoble recently got an Apple MacBook Pro 17-inch laptop. And the first thing he did? He asked a few of his friends to let him know what utilities/apps/services he should load.
This ink goes to the responses. If you have a Mac, you may already know about many of these. But then, maybe not. YMMV. Insert disclaimer here. Have fun.