There are 2 repositories under github-icons topic.
GitHub folder icon for use in macOS. Made so that it fits nicely alongside all the others inside your home directory. Mac OS X 10.5 (Leopard) through to macOS 13 (Ventura).
A desktop icon manager application
A browser extension which gives different filetypes different icons, and code color theme to GitHub and Octotree for free.
A GitHub file icon theme for Visual Studio Code
Level up your GitHub profile with personalized icons – effortlessly showcase your skills and interests!