XnView is a freeware utility for viewing and converting images. It can import over 400 and export to 50 graphics formats. XnView is provided as freeware for private non-commercial or educational use.   Here are some of the features: Multipage TIFF, Animated GIF, Animated ICO support Image... 

  Irfan View is a small and very fast image viewer, converter and it has some editing features. It supports all major graphics file formats. It has a also plug-in support so support for new file formats can be added easily and you can even turn it into an mp3 player. It has some basic editing... 

FastStone Image Viewer is as the name says image viewing application. It is a much more than image viewer, it is also a image browser , converter and editor. It is very fast and user friendly. Editor has few easy to use features like resizing, renaming, cropping, color adjustments, watermarks, red-eye...