Voodoo OTA RootKeeper

Does not work for Android 4.3 updates

This application makes a backup or a protected backup of your device’s root.
This device must already be rooted: OTA RootKeeper doesn’t have the ability to
root devices. If several conditions are matched, OTA RootKeeper will make root
survive OTAs, and anything else except /system partition formatting.

Requirement:

* /system partition as Ext2, Ext3 or Ext4
* Upgrades not formatting or overwriting completely the /system partition.
* See website for info about devices that meet these requirements

Require root: Yes.