Color Palette Generator - Enter the URL of an image and find its color palette
Site Palette - Get the essential colours from any website
Material Palette - Generate and export your Material Design color palette
Klart.io Colors - A data-driven collection of beautiful color palettes 🌈
Sketch Palettes - Sketch plugin to save and load colors into the color picker
Color Palette Manager - This nifty app helps you create, manage and share palettes.