XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
RealWorld Photos - RealWorld Photos is an free portable photo editor for Windows.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Online Image Editor - Online editor for images and animated gifs with multiple effects and tools
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
SoftColor PhotoEQ - SoftColor PhotoEQ makes color correction, image editing and color management tasks simpler.