The Markup.io bookmarklet turns any web page into a whiteboard where you can draw, type notes, and easily share your annotations with others.
From any web page, click the Markup.io bookmarklet to get started. Markup.io’s editing tools are layered over the site and you can draw shapes, create text notes, and alter the size of text, borders, and lines. When you’re done you simply click Publish and share the URL with your friends, coworkers, or anyone else you want to share your annotations with. Anyone who visits the link can view your notes and choose to respond, either layering their notes over yours or creating a fresh MarkUp. The people you share the link with don’t need to have the bookmark, Markup.io gives them a quick summary of what’s going on, invites them into the editing process, and automatically loads the Markup.io editing tools.
[via Lifehacker]
