ColorSnapper - The missing color picker for Mac.
Material Palette - Generate and export your Material Design color palette
Colordot for iOS - A color picker for humans.
Color Hunt - Curated collection of beautiful colors, updated daily
Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!