ColorZilla - ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.
Colors & Fonts - Css gradients, color palettes & font pairing 1 click 1 place
Adobe Color CC - Generates color themes that can inspire any project.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
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
SwatchBooker - Free and open-source application to create, edit and (batch) convert colour swatches and palettes.