Elements: Dashboard UI kit for Photoshop and Sketch - Freebiesbug
UI Kit PSD - Mobile App - Free Photoshop Brushes at Brusheezy!
GitHub - bootflat/Bootflat.UI.Kit.PSD: Bootflat UI Kit is PSD User Interface Pack including a set of beautiful and pure components, which you can use to create startup projects, websites or iOS/Android Apps.