Another awesome freebie created exclusively for DesignHooks users by Jon Rundle.
Snap Kit is an iOS 8 wireframing tool built for Sketch. Use Snap to quickly mockup your app’s flow through common iOS 8 screens. Use the existing elements to make additional screens and customize to your own uses.
It contains 22 beautiful iOS 8 mockups and lots of UI components that you can use to create elegant wireframes and structured app flows.