Picasa is a software application for organizing and editing digital photos. You can download it for free from Google. If you create a Google Account, you can post your photos to Picasa Webalbums with a click of a button.
Create a Google Account
Click here for the free download.
Check out Google for Educators and see how to use Picasa in the classroom.
Using Picasa in Your Classroom
Kitzu, a collection of free, educational, copyright-friendly media resources