Adobe Color CC - Generates color themes that can inspire any project.
iWantHue - Colors for data scientists. Generate and refine palettes of optimally distinct colors.
Colllor - With Colllor it is much easier to generate a consistent color palette with just a few clicks.
COLOURlovers - COLOURlovers is a creative community where people from around the world create and share colors, palettes and patterns, discuss the latest trends and explore colorful articles... All in the spirit of love
Color Palette Generator - Enter the URL of an image and find its color palette
Colorwheely - A web tool for making a 12-color color wheel, from one or two starting colors.