MysticThumbs generates thumbnails of many image types not natively supported by Windows. It does this transparently and in the background for Explorer so you don't have to run a separate application to preview your images. It is a native Windows Explorer plugin which means you don't have to do anything other than install it. This means you don't have any new interfaces to learn, think about or otherwise deal with. It also comes with QuickView - like a make click to see a preview of your image and its data.
MysticThumbs has a fully configurable control panel where you can adjust thumbnail generation options and icon overlays, with options like transparency, thumbnail borders, scaling, embedded thumbnail selection and more. Compound file support for files such as HTML, Maya and EML that use external files to make a complete image. Options are controlled on a file type / extension level or if required on specific files through context menu control in Explorer.