Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
Color Palette Generator - Enter the URL of an image and find its color palette
Colormind.io - A color palette generator powered by deep learning.
Materialette - A material design color palette on macOS / Windows / Linux
MagicPicker - An advanced color picker for Photoshop & Illustrator 🎨
Material Palette - Generate and export your Material Design color palette