Now is a cross-platform UI kit for web, tablet and mobile devices.It’s been designed by Invisionapp and totally free.
This comprehensive UI kit has over 52 complete design templates, 35 custom icons, and over 180 UI components.
NOW is ready-made for creating immersive cross-platform experiences. The free UI kit includes iOS app templates, tablet templates, and web templates, and it’s available in both .SKETCH and .PSD file types.