Over the years, the number of BlackBerry applications has grown considerably. Here are five great apps that extend the functionality of your BlackBerry; they're all free, so give them a try!

App Name Category Features
Facebook Social Networking With Facebook for BlackBerry, you'll never be out of touch. You can send messages, post comments, update status, add new friends, and more. Uploading pictures and posting as things happen makes it easy and quick for your friends to keep tabs on what you're doing.
Google Maps Maps / Directions Google does a fantastic job of extending its maps service. Some of the features include: GPS location, satellite views, full turn-by-turn directions, real-time traffic, transit lines, bicycling paths, and a simple search to find anything you need.
Poynt Location-Based Poynt is the one-stop shop for looking up businesses, people, movies, restaurants, and gas prices.
Slacker Radio Music Streaming Slacker Radio has a huge selection of different genres, ranging from Alternative, Comedy, Hip Hop/R&B, to International. Slacker's caching feature allows you to store thousands of songs on your BlackBerry smartphone, saving you precious battery life and allowing you to listen without any breaks even if you don't have a wireless signal.
Vlingo Productivity With Vlingo, you'll rarely have to touch your BlackBerry keyboard ever again. Send text and e-mails, and search the Internet through Vlingo's voice controls. Vlingo also speaks your incoming text and e-mail messages.