Online photo editing services are more and more popular and feature packed. Stand alone tools are expensive. Here's a roundup of interesting and useful online photo editing tools that teachers and their students can use.
"While most photographs are rectangular, the tools we use to edit them come in all manner of shapes and sizes. We've looked at more than a dozen different online services that let you edit your photos and capture what each one of them looks like so you can get a preview before you dive in.
To see how they stack up against each other, click here for a complete comparison chart."
Images: Zooming in on photo editing tools | TechRepublic Photo Gallery