Khroma is the fastest way to discover, search, and save color combos you'll want to use.
Flinto is a Mac app used by top designers around the world to create interactive and animated prototypes of their app designs.
Boxes and Arrows is devoted to the practice, innovation, and discussion of design; including graphic design, interaction design, information architecture and the design of business.
质量很高的设计素材网站（良心推荐）
Animate Your Ideas, Design Better Apps
高保真交互原型设计
Evidence-Based User Experience Research, Training, and Consulting
Flinto is a Mac app used by top designers around the world to create interactive and animated prototypes of their app designs.