The best photo editor and organizer (2in1 product) for me is the Picasa software. I tried almost everything that is out here, and i stooped here, at Picasa. I think overall product quality is very good and the fact that is integrated with Google+ is an extra feature that i am happy to have.
The editing on this application is a easy process, making it easy to use.
The only feature that i quite don’t like is the auto-save feature which all the time you have to click Menu and Save (or CTRL+S), but on the other hand you can be safe that none of modifications are beeing saved without your awareness.
My second favorite, is Windows Live Photo Gallery, but i stopped using it since my #1 is Picasa.
What is your favorite?