Samsung has released some new open source Android files for some of its devices, the files ate for Android 4.1 Jelly Bean, and they apply to a number of devices.
The devices included in the list include the AT&T version of the Samsung Galaxy S III and the Galaxy Tab 2 10.1 and Galaxy Tab 2 7.0, neither of the two tablets have received the Android 4.1 Jelly Bean update as yet.
Samsung has also released the open source files for a number of their other devices, many of which have already received the Android 4.1 Jelly Bean update, you can find out more details over at Samsung.
Source Android Police