DeOldify is a deep learning project for colorizing and restoring old images using a Self-Attention Generative Adversarial Network. Windows GUI available here https://github.com/ColorfulSoft/DeOldify.NET.
ColouriseSG provides an easy way to colorize old photos online. Specifically made for old Singaporean photos, the web based tool lets you upload an image and quickly get a colorized version.
Transfer style from an image or painting to your image. Colorize your black and white photos or videos by using the automatic image colorization. All processing is done on your device.
Add colors to black & white photos and recolor images with surprizing ease! Just sketch simple color strokes over photo objects. The app will apply picked colors automatically, in real time.
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. AKVIS Coloriage is available in two versions – as an independent program (standalone) and as a plug-in to a photo editor.
Auto Colorize Pro is a revolutionary photo coloring application which lets you use new automatic colorization technique based on scribbles to change the color of any object on your photo. Just mark part of the image with any color and let the magic happen.
Pixbim Color Surprise AI works on both windows and Mac as it colorizes black and white photos. It runs on your system and it is very easy to use. It is based on artificial intelligence. It is very popular software.