I have to say my favorite mobile app has to be the splashtop app for iOS. The app allows you to connect to your home pc or Mac remotely over 3G and wifi. It's a vnc type app works great
I use this app all the time. It like turning your table or smart phone into a mini computer. Everything you can do sitting in you home computer you can do sitting at the park.with audio and video. The only downside is having to keep you computer at home or work running.