My favorite image file viewer and editor: Irfan View
By Steve Rose
Sunday, March 02, 2008
Small, fast, loads JPEGs at lightning speeds, doesn't require a playlist (moves through files in a directory by pressing the space bar or backspace key):
Download starting at http://www.irfanview.com
It can even do many editing and manipulation tasks, including rotate, gamma, and colors, as well as apply photoshop filters.