ColorZilla - ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.
Adobe Color CC - Generates color themes that can inspire any project.
Colors & Fonts - Css gradients, color palettes & font pairing 1 click 1 place
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
Paletton - Color Scheme Designer
sK1 Color Picker - Color picker application powered by magnifying glass and palette management functionality.