This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
HoodooYabuli is a factory firmware based on iOS 5.1. It is able to run on iPhone 3GS, iPhone 4, iPod touch (4th generation) and iPhone 4S. Due to the fact that it contains kernels for other devices (something which is common for most SwitchBoard filesystems), it can possibly be installed onto other devices. It's stable and does not encounter many bugs.
The firmware originally appeared as an encrypted restore bundle for the iPhone 4, which keys were eventually found for. IPSWs for the iPhone 3GS, iPhone 4 and iPod touch (4th generation) have since appeared and can be used to restore these devices via bootrom exploits, such as limera1n.
This build contains the following applications applications launched through SwitchBoard.app: