A simple image-viewer application, demonstrating how to code a Morphic application, how to access the filesystem, how to manipulate images, and how to manage a multi-threaded application.
Version 1 required a couple of newish features (String>>startsWith: and Collection>>select:thenDo:), so I've replaced them. Version 2 and later should be happy on a 3.7/3.8 image.
Please see the Wiki for more information including download notes!