Pangu released a jailbreak tool for iOS 9.1 yesterday after it was found that the exploit it uses was patched in iOS 9.2 and later.
Although most people are running iOS 9.0-9.0.2 for their jailbreak and can't update to iOS 9.1 because iOS 9.2.1 is the current firmware, the tool still gives those who were holding out on iOS 9.1 for a jailbreak a way to enjoy their favorite jailbreak tweaks again.
If you were one of the few who got to use the tool, then you're probably wondering what jailbreak tweaks actually work on iOS 9.1.