Apps similar to Folder Marker include Dyet. It's paid, but Folcolor™ and Crystal Folders are free. Other options are Folder Painter, FileMarker.NET, Folder Colorizer and Folderico. Desktop Customization Tools like Folder Marker are a crowded field, with more than 25 alternatives for Windows, Mac, Linux and the web.
Iconic lets you easily add images on top of a folder icon. It is mostly meant for Gnome. This application is my first attempt at creating an application using Rust and Libadwaita.
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FoliCon is a free, open-source Windows application designed to automatically create and apply custom, high-resolution folder icons for movie, TV show, anime, game, and music collections.
