QuickTime PictureViewer - QuickSummary

PictureViewer is a component of QuickTime for Microsoft Windows and the Mac OS 8 and Mac OS 9 operating systems. It is used to view picture files from the still image formats that QuickTime supports. (from Wikipedia)

Windows: If you have QuickTime Pro, you can use PictureViewer to import and export various types of still image file formats and to rotate images. PictureViewer is in the QuickTime folder on your hard disk. (from Apple.com)