A collection of useful, open source applications that demonstrate features of the Android platform:

• Amazed: A simple but addictive accelerometer-based marble-guidance game.

• AndroidGlobalTime: a full representation of the Earth that you can spin around.

• AnyCut: A utility that lets users create Home screen shortcuts to nearly anything in the system.

• Clickin2DaBeat: A game that mashes up YouTube with custom rhythm-game logic.

• DivideAndConquer: a game in which you must isolate bouncing balls by creating walls around them.

• LOLcat Builder: O HAI. I CN HAS CHEEZBURGER?! IM N UR PHONE, CAPTIONIN UR PHOTOS.

• Panoramio: An app that shows you nearby photos and points of interest.

• Photostream: An app that lets you view photostreams from online photo-hosting services.

• Radar: A radar-style relative location display view, used by Panoramio and others.

• RingsExtended: A utility that provides enhanced control over ringtones.

• Samples: Miscellaneous examples showing features of the Android platform (among which OpenGL ES).

• SpriteMethodTest: An application that compares the speed of various 2D sprite drawing methods.

• Translate: Translates more than 150 language pairs with Google's translation service.

• WebViewDemo: How Java and JavaScript can call each other inside a WebView.

• WikiNotes: A wiki note pad that uses intents to navigate to wiki words and other rich content stored in the notes.