What are some good iphone apps to have on me?

What are some iphone apps that you guys recommend to have?
Stuff that could make me more productive or maybe an app that just adds convenience to my daily routines? I'm also looking for apps that keep me up to date in stocks/business and news around the world. Or maybe an app that offers inspirational quotes. Any recommendations?

Musts include a flashlight app. Amazing how handy that can be if you drop your keys at night.
I have a magnifier app on my android.
I also have a car expenses app so have the gas expenditures for the entire life of the car.
I travel for the company so have Expensify. It records my receipts
You can now install Google search which includes Google now. That can monitor those stocks you mention. It works with your Google search and settings. Mine knows who my sports teams are for example.
I use Feedly for news. IF your sites have an RSS feed, then Feedly will work great.
Waze is a navigation app with social engineering that Google is buying. It knows where the cops are!
If you use Evernote, that is there too.
I also put a copy of Wolfram Alpha's app on it as it does wonderful for calculations
If you collect business cards, then camcard. It can scan a business card and put it into your contacts etc.
I put a movie collections app to track what disks I have so I can know when I'm in the store.
If you and your significant other make a joint grocery list, there's an app that not only makes them, they share them so if you arrive at the store to pick up the forgotten dinner rolls, you might find that your phone also knows that you need apple cider for thanksgiving dinner.
If you ship a lot, package buddy. It tracks them for you.