PrincipleRepo
Free, High Quality Principle Resources
UI设计师自用导航
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Freebiesbug
Hand-picked resources for web designer and developers, constantly updated.
uplabs
Daily resources for product designers & developers
稀土区
优质设计开发资源分享
Designmodo
Web Design Blog and Shop
Freebie Supply
Free Resources For Designers
Fribbble
Free PSD files and other free design resources by Dribbblers.
ui8
UI Kits, Wireframe Kits, Templates, Icons and More