This remarkable free piece of software is one that any self-respecting digital photographer needs on his or her PC's hard disk. There's no possible way to begin to describe the wide range of tools and features this one has--there's everything from a file viewer to a photo editor, slide show creator, batch editor, screen capture program, and more. There are some quite original and innovative tools in Photoscape, such as combining multiple photos in a single frame. There's also a small, but extremely useful tool--it will take photos that are in the RAW format used by many digital cameras, and convert them to JPG, so that they're more useful.
http://www.photoscape.org/ps/main/index.php