We promote and discuss the ‘Building Block Philosophy’ for Google's Android mobile phone platform. The Android Intents system allows mobile applications to share data and work with each other. We started this open source project in Dec 2007 to create developer tools and applications showcasing the use of intents. OpenIntents has reached so far over 2.5 million application downloads from the Android Market (OI File Manager has over 1 million, OI Shopping List over half a million), and many more downloads from outside the Android Market, besides phones that ship with pre-installed versions of OpenIntents apps, and Cyanogen Mod 7 that is shipped with the OI File Manager by default. Further, our Sensor Simulator application is now an essential developer tool to simulate hardware sensors on the emulator.

Our code repository can be found here: http://code.google.com/p/google-summer-of-code-2011-openintents/