Tetrisly - Starter kit for design systems and wireframes builder (Sketch/Figma)
Color Palette Generator - Enter the URL of an image and find its color palette
Material Design Icons - 750 Free open-source glyphs by Google
Color Hunt - Curated collection of beautiful colors, updated daily
React Rainbow Components - Build your web application in a snap.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!