Picasa 3 ROCKS!
Graphics handling programs aren’t typically much fun to use, as in slick, cool, stylish… Picasa has pioneered in that arena since version 1.
They’ve really outdone themselves with the latest version (3). Go grab this right now! Make sure you let Picasa handle the JPG files on your computer, giving it permission to be the default display program for those files (and it is programmed with the common courtesy to ASK you if you want this, as it is installing).
VERY powerful browsing capabilities, with a free space to upload them and share them with the world to boot.
Get it from my favorite download site, filehippo.com: http://www.filehippo.com/download_picasa/