CODIJY Pro Photo Colorization - Add colors to black & white photos and recolor images with surprizing ease!
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Myheritage In Color - Myheritage In Color is a best-in-class technological tool that has been designed for colorizing old photos.
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
DeOldify - Open-source deep learning project for colorizing and restoring old images
Clip Studio Paint - The artist's software for drawing and painting.