JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
FastStone MaxView - FastStone MaxView is a fast, compact and innovative image viewer that supports all major graphic...
MycView - MycView - Small viewer with automatic or manual mode (formats: jpg,gif,png,bmp,dib,ppm,pnm,wmf,emf).
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Artsage - ArtSage is a small graphics viewer. It displays the image files in a folder tree.
ImageGlass - You can use Image to view your digital images and photos of many different formats.