WSJ.com - The Mossberg Solution: The Best Photo Organizers: "Two of the best photo organizers have just been updated, and I have been testing them on my collection of more than 10,000 digital photos. One is Picasa 2, which runs only on Windows and is now a free offering from Google, which purchased Picasa last year. The other is Apple Computer's iPhoto 5, which runs only on the Macintosh. It comes free on every new Mac. Existing Mac owners can buy it as part of the excellent $79 iLife suite, which also includes programs for organizing and editing music and videos, and for authoring DVDs.
Both programs are packed with good features and have been significantly upgraded in their new versions. But iPhoto is the better of the two -- mainly because, unlike Picasa and most other competitors, it totally frees users from understanding the computer's file-and-folder system. With iPhoto you can organize your photos in any way you choose, regardless of where the underlying picture files are stored on the computer. This makes iPhoto much easier to use than Picasa, or any other photo organizing program I have tested."