Who Can Use - WhoCanUse is a tool that brings attention and understanding to how color contrast can affect different people with visual impairments.
Palette For Mac - A menu bar based colour contrast analyser
Kontrast - Check and adjust web element contrast in real time.
EIII Checker Suite - The checker services can help you to locate and remove barriers on webpages or in PDF-documents.
Ticket to Ride - Ticket to Ride is a Turn-based Strategy, Puzzle, Board, Co-op, Single, and Multiplayer video game created and published by Days of Wonder and Asmodee Digital.
Colordot for iOS - A color picker for humans.