Google Sky Map & Transparent Screen
First up is Google Sky Map by Google
This is such an awesome application for your android device especially if it is warm out and you love the stars. With this app you can see exactly where constellations are based on your current location. There is even a night setting so you don’t burn our your retinas.
Second, we have Transparent Screen.
This one will come in handy if you have the tendency to walk into thing while you are sending or reading text messages and emails. Simply enable the screen transparency and the camera of your smart phone or tablet will display a live feed as your wallpaper. There are settings for the image quality and amount of transparency.