UI Movement - The best UI design inspiration, daily
StockUnlimited - 1 Million+ affordable royalty-free stock photos, vector graphics, icons, infographics & more
UI Garage - Specific mobile and web design patterns for your inspiration
Freevector - Freevector is a best-in-class platform that provides millions of images, icons, wallpapers, brand logos, and vectors.
UI8 - Carefully crafted UI design assets
Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.