Free apps turn your iPhone into a multipurpose tool - USATODAY.com

The numbers are astounding. Apple has sold 50 million iPhones. More than 2 billion applications have been downloaded from Apple's App Store. At last count, there were more than 85,000 apps available.

Apps are little programs that add fun and features to the iPhone. They're available for just about anything. The following are free apps no self-respecting iPhone owner should be without. To find them, open iTunes, or the App Store app on your iPhone, and search using the name of the app...