Here are my non-gaming apps. I'll try to list the not previously mentioned first:
Yelp - Even if you don't write reviews for Yelp, the app is great for finding restaurants near you. When you go to a new restaurant, you can quickly scan the Yelp reviews to find out what the most popular or "gotta try" dish is in the place you're sitting. Because of Yelp, I stopped using Urbanspoon. The full website is a better way to find new food destinations near you. If you
write for Yelp, you can upload photos taken from your phone to the restaurant review.
To Do's - Keeps track of To Do lists.
Units - Conversion app: temperature, metric system, currency exchange rates (downloads the daily rate) that's been useful.
Photoswap - Picture swapping app. Take a picture with the iPhone camera, send it to a random stranger (who also has the app), they can reply with their own picture.
Fiatlux - Turns your phone into a flashlight.
Closet - Take pictures of clothing in your wardrobe (separated out by category). Then when you're out shopping, you can pull out pictures of your wardrobe to see if you already have something like what you're buying, or you can see if it matches something you're considering purchasing.
Jared - Jared sings. I love it.
Tiny Violin - When someone busts out the sob story, you can mock them with the world's smallest violin (which makes sounds as you play it).
Now Playing - Movie review/showtime/Netflix all-in-one app
Flixster - I use this solely because of the link to Facebook. I can mark movies I want to see and check out what my friends are looking forward to. Now Playing doesn't let me do that.
Pandora - Mobile streaming radio that learns your preferences, a la Yahoo! Launchcast or Last FM. I am slowing transitioning over to Last FM because of Xbox, so I may swap this out with a Last FM app.
Facebook - This app actually doesn't do a lot of things that the main site does, so I don't use it exclusively over the real website. I mainly use it to upload mobile photos and check my notifications.
Shazam - Great for finding what song is playing on the radio. More importantly, it keeps track of which songs you tagged, so you can download them later.
CheckPlease - Tip calculator which is great if you're eating with large groups and want to split a check 8 ways while adjusting the tip percentage up or down. You can also have it round off so you're not splitting hairs over pennies (although you can do that too).
Twitterific - Twitter client. I don't twitter much, but when I do, this app seems to do the job.
Wikipanion - Mobile optimized version of Wikipedia, which is always useful.
Dial Zero - I rarely use this. It's supposed to give you hints and tips to get around automated customer service lines. Type in the place you're going to call and reader comments tell you what numbers to hit to get a real person. I tried it once with Time Warner (who is notorious for having horrible customer support), and the numbers posted didn't help at all.