IrfanView - IrfanView ... one of the most popular viewers worldwide.
ImageGlass - You can use Image to view your digital images and photos of many different formats.
nomacs - nomacs is a free, open source image viewer, which supports mu
qView - qView is a Qt-based image viewer designed to be practical and minimal
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!