Color Palette Generator - Enter the URL of an image and find its color palette
Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
Site Palette - Get the essential colours from any website
GIF Brewery by Gfycat - Create stunning GIFs from videos & screen recording for free
Material Palette - Generate and export your Material Design color palette
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.