I’m not excited over Plaster, either, but it’s free, works well, and does what it does well enough compared to other Mac apps that actually have a price tag and a feature set.
Plaster exists because somebody somewhere at sometime had a need to create a new icon for the Mac’s folders. That’s what Plaster does. It plasters an image onto folder icons. Drag and drop an image file from the Finder to Plaster.
Voila! New folder icon.
Ease of use and low cost (as in ‘no’ cost) is reason enough to try Plaster if you’re bored with Apple’s boring folder icons.
That doesn’t mean Plaster is devoid of features. Images can be cropped, corners can be rounded, background color can be filled, and you can even add a border or crop the image.
Plaster has a few surprises, too. Drag a folder of multiple image files onto Plaster and it will choose one at random. Hit the Try Again button if you don’t like the random selection. What’s missing are all the graphic design controls and tools you’ll find in other file and folder icon apps, but Plaster is free and simple and works.