We were honored when our friends at Adobe asked if we'd like to give ongoing feedback throughout the development process of Photoshop CC 2015.
To pay it forward, we made an iOS 9 UI Kit for you. Get started mocking up those iOS 9 apps (with artboards!).
Download the UI Kit here: http://adobe.ly/1FY1Bc8
Alternate Download Link
(Note: You'll need the latest update of Photoshop to use this file)