Mobile ODIN is an app that is an on-device ODIN utility that allows you to flash firmware directly from the device. This removes having to connect your device to a computer to flash firmwares although bootloader partitions and EFS aren’t flashed via the app.
Mobile ODIN is now at version 2.0 which has added support to many more devices and updated kernels for previously supported devices. The lite version can be found at XDA, and the pro version can be found on the Android Market.
New Devices added to Mobile ODIN 2.0:
Samsung/Google Galaxy Nexus, GSM and CDMA/LTE variants