Folder Marker - Change folder color in two mouse clicks for easy at-a-glance identification.
Replacicon - Just updated to macOS Big Sur? You may have noticed some of the apps in your Dock look a bit inconsistent with the rest of the system.
Folder Painter - Folder Painter is an easy to use Portable Freeware program, which allows you to change the color of the icon representing a chosen folder to any color you like
LiteIcon - LiteIcon is a simple app which allows you to change your system icons quickly and easily.
Folder Colorizer - Windows Explorer is too boring? Color it up!
Pictogram - Customize macOS app icons with ease