This is a fantastic web 2.0 tool. Upload images and annotate. You can other embed media inside the annotations. Annotations pop up as you click or hover over the objects you add. You can embed the annotated image into webpage or blog. This could be a useful tool for teachers and students. Lots of scope for creativity with layers etc. You can share to a group and set editing permissions for public or restricted people/groups for collaboration purposes.
upload a document - and then review, annotate, mark up and comment online - great for student feedback. Allows collaboration online and sharing - PDF like, with cloud based interaction
Mr Picassohead is a fun website. It allows users to create their own 'Picasso' by selecting different types of faces and facial features, colours and so on and dragging them onto a canvas. It is a great way to begin a unit of work on Picasso, Cubism or abstract art with students.