Who Can Use - WhoCanUse is a tool that brings attention and understanding to how color contrast can affect different people with visual impairments.
Color Palette Generator - Enter the URL of an image and find its color palette
Cron Color - Free web tool for designing color palettes and checking contrasts.
Color Hunt - Curated collection of beautiful colors, updated daily
Palette For Mac - A menu bar based colour contrast analyser
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!