Photo Manager Picasa is by far the best photo managing software for a variety of reasons, here are my Top 5
1. It is free to Download
2. It sorts photos easily by folders or allows users to define photos by tags
3. Picasa provides basic photo manipulation capabilities such as red eye, contrast, and brightness editing
4. You can also easily email photos to other through the application and store your photos online on Google’s free web album that is similar to Flickr.com
5. The software has a very user friendly interface