Instant ThumbView is a tiny image viewer that displays the thumbnail of a selected image file in a popup window, when the mouse pointer is hovered over an image file. It supports most popular image file formats, including BMP, GIF, JPEG, PNG, WMF, EMF and TIFF . and is convenient for quick image viewing. To invoke it, open any folder with image files in Windows Explorer,

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.