Ian Beer, a Google security expert that works for Project Zero, the iOS jailbreak scene was given a new lease of life since his exploit worked on all devices running iOS 11 (up to 11.1.2).
Houdini on iOS 11 allows you do the following:
Change icon shapes.
System-wide ad blocking since Apple only allows Content Blockers to work in Safari!
Change emoji fonts (do note that only you will be able to see the custom emojis as the receiving end will receive normal emojis)
Change the boot logo.
Add your face to Animojis – iPhone X only (quite obvious, eh?)
More features such as removing icon labels!
The g0blin jailbreak is almost ready since both Cydia and Cydia Substrate work and only a small issue with entitlement (permissions) for root apps needs to be sorted out before a release can be made available for the public!