Mobile apps are increasingly influential, as they can spread to millions of tablets and smartphones. Here are 15 that will make a difference in 2011
15 apps to watch in 2011
Amazon Cloud Player
TWCable TV app
Adobe Photoshop Express
Bing for iPad
See another slideshow: App-surdity quiz: Are these iPhone/Android apps real or fake?
Platform: iOS, Android
What's cool: The upcoming version of Fring for iPhone and Android will be the first to offer free, mobile group video calls with up to four people at once. A beta is now available.
Keep watching: Most smartphones now include a front-facing camera, enabling easy video chatting--but most of these apps work well only on Wi-Fi. Carriers are slowly moving to 4G, which will enable good-quality video calling from even more places.