Check out the ZURB JavaScript Annotation Plugin »
Our latest application Verify allows you to collect user feedback through interactive tools. Most of these tools require the user to annotate an image so we came up with a single plugin we could use for the entire app.
The plugin uses jQuery and makes it dead simple to add and save image annotations.
Hop right on over to the ZURB playground to see a demo and the full documentation. The code playground is where we do crazy awesome stuff with JavaScript, HTML, and CSS.