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