Free Web UI Kit for creating clean interfaces in Photoshop - FreebiesUI
Free PSD UI Kit for Your Web Applications
Novo UI Kit : Free PSD - Freebie Supply
Dark UI Kit (PSD)
Free Health Assistant App UI Kit Free PSD at FreePSD.cc
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.