FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
HoneyView Viewer - HoneyView is a fast and lightweight image viewer that supports various formats, including JPG, BMP, GIF, PNG, PSD, DDS, UFO, and ICNS.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
pic view - A simple picture viewer and manipulator. Open source (CBuilder 5). Features: - Slideshow
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Free TIFF Viewer - Free TIFF Viewer is a software tool that allows users to open and view TIFF files.