IrfanView - IrfanView ... one of the most popular viewers worldwide.
Fragment - A powerful image viewing suite with advanced metadata info
ImageGlass - You can use Image to view your digital images and photos of many different formats.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Universal Viewer - Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are:
FreeVimager - Free & Fast Image Viewer and Editor for Windows.