CyanogenMod is one of the most famous custom Android ROMs which is available for many devices. Recently CyanogenMod started testing its 7th release which was based on the Gingerbread AOSP. CyanogenMod 7.0 is the first to officially support Android tablets. CM7 is based on the open source Android 2.3.3 Gingerbread operating system for smartphones. Over 30 devices are supported, and the latest builds include versions for the Barnes & Noble NOOKcolor and ViewSonic G-Tablet, including gesture-based navigation.