Twittelator Pro

This app acts as a Twitter client and is packed full of many useful features. You can tweet high resolution pictures, videos and audio clips. Viewing a map of your location (you can also post a map of your location), you can see others around you & what they are tweeting about. You also have the option to create your own theme/s, or alternatively choose from one of the 4500 included. On top of all this, there are many more interesting features, making this app an excellent twitter client.