In short: the REPACK is what the original OpeniBoot should have been — stable, documented, and easy to flash.

The original Google Code repositories and early GitHub mirrors for the iDroid project and OpeniBoot have largely been abandoned or archived. The original Wiki pages are offline. Consequently, users looking to experiment today cannot simply go to an official site. They are forced to search for third-party "repacks" uploaded to file-hosting sites or forums.