Complements the desktop app very well, syncs over wifi. Very simple, not too much to play around in and lose focus.

Throw away the default iPhone calculator and any other unit conversion apps you have and use this instead. Simple yet full of features.

If you’re the type to completely forget what it is you’re shopping for every time you go buy food, get this. I’m not sure I use it the way the developer intended, as I make one long permanent master list, and check/uncheck items based on have/need status. Too much work to create a new list every single time.

If only just for how well designed it is and how fun it is to use.

If you hate car maintenance because of all the crap you have to remember to do.

Simple and works well.

Best dictionary app yet, and a bunch of other stuff like anagrams and crossword solver too. Great “words of the day” feature to help increase your wordiness.

Some people praise BeeJive and the official AIM client, but for my money this is the best one yet. Supports several common protocols and has a clean usable interface.

Fast, clean, bunch of features (trends, search) and it can fart too. What more could you want? Can also support more than one account.

If you need a VNC client on your iPhone, this is the one to get. Most stable, fastest, and most remote control features with no resolution limits.

Package tracker that syncs with the Dashboard widget, and looks fantastic.