The Google Android mobile operating system is now officially available for free as an open source system, says the Android Open Source Project.
Google and its partners have now begun sharing Android's underlying source code.
The Android Open Source Project site now includes the Android source code itself, along with a host of other features for developers to make it easier for them to develop mobile apps.
T-Mobile has already announced the first mobile device to use the Android OS, which will be available from next month.
The Android code is managed by the Android Open Source Project and anyone contributing code to the project must sign a Contributor's License Agreement.
Site URL: http://source.android.com/