The design team at Invision just released another awesome free resource called Relate UI kit, a package for Sketch and Photoshop which includes 45 templates, 15 categories and more than 99 elements that may come in handy to create beautiful, high-fidelity prototypes. Minimal, scalable and pixel-perfect… it’s worth a try!
Relate UI kit: 45 free templates for Sketch and Photoshop
PSD
Sketch
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UI kit by Invision"