I finally took the plunge and bought myself a small tablet to see if I've really been missing anything. Turns out I've been missing a lot!

My question is this: what apps do you use every day and don't want to live without now that you've found them?

There are simply too many apps out there to sift through, so list your favorites here in one place - I know apps have been mentioned here and there on the forum but I can't find them easily...