LabelsWin!

Folder Marker is your small assistant, an ardent fighter for your convenience and comfort in any kind of computer work. Use Folder Marker to mark your folders. One mouse-click and it becomes clear at once which documents have a high priority, and which of them have a normal or low priority. It is easy to see which operations have been finished completely, which are partly done and which havent been started yet.

TrioXLabels is a utility that lets the user easily mark files and folders in the disk as one of the many pre-designed beautifully-coloured labels. It’s the closest you'll get to a Windows version of color label on Mac OS X.

Windows Explorer is too boring? Color it up! Assign any color to any folder – just right-click a folder and choose “Colorize”! Supports your own colors, labels and works seamlessly with any version of Windows.

iColorFolder is a software allowing to change the color of Windows XP folders, with a simple right-click on them. It is fast, doesn't stay in memory, and comes with a Skin Selector. It supports a lot of different skins based on popular icon sets.

FolderHighlight is a small but powerful tool that changes the visual appearance of the folders in your PC. With FolderHighlight you can quickly change the color of any folder.

Xentient Labels, free and safe download. Xentient Labels 1.1: Adds color labels to Windows icons.