DeOldify - Open-source deep learning project for colorizing and restoring old images
Material Palette - Generate and export your Material Design color palette
CODIJY Pro Photo Colorization - Add colors to black & white photos and recolor images with surprizing ease!
Material UI Colors - Color palette for material design
AKVIS Coloriage - AKVIS Coloriage manipulates colors of an image: from colorizing old black and white photos from your family archive to replacing colors in your color photos.
Picular - Google, but for colors.