I recently ran across this article called The Best Web 2.0 Applications For Education – 2009, which appeared on Larry Ferlazzo’s blog dedicated to resources for ESL teachers and learners.

To cite just one example, here’s #6: “Blerp lets you annotate webpages and … might be the best tool of its kind out there. … Type in a webpage address, click on “post” and you can type on a virtual post-it note and place it anywhere on the text of the page and you are then given the page’s url with the notes. It’s extremely user-friendly.”