Google launch the App Inventor, a framework to develop apps for Android. You can create any app is in your mind.
You can build just about any app you can imagine with App Inventor. Often people begin by building games like WhackAMole or games that let you draw funny pictures on your friend's faces. You can even make use of the phone's sensors to move a ball through a maze based on tilting the phone.
But app building is not limited to simple games. You can also build apps that inform and educate. You can create a quiz app to help you and your classmates study for a test. With Android's text-to-speech capabilities, you can even have the phone ask the questions aloud.
The App Inventor interface is very simple but powerful. The Google developers make "almost everything" to help you with the development (touch controls, buttons, etc).
If you like it, or you always dream to make your own android app, so you can. Just fill this form and you are on your way to start making Android Apps with the Google App Inventor.
Source: Google Labs