ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
HoneyView Viewer - HoneyView is a fast and lightweight image viewer that supports various formats, including JPG, BMP, GIF, PNG, PSD, DDS, UFO, and ICNS.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
pic view - A simple picture viewer and manipulator. Open source (CBuilder 5). Features: - Slideshow
Fotor - Fotor is an all in one visual platform. It includes photo editor, collage maker, and graphic designer. You are free to make a visual look more beautiful.
Free TIFF Viewer - Free TIFF Viewer is a software tool that allows users to open and view TIFF files.