Here's the website: http://markup.io/
We created MarkUp at Medium to help make the QA process better for
sites we're working on. Grab the MarkUp bookmarklet, go to some page
in your browser, then click it to draw on the page. Publish to make a
link you can share.
We've tried similar tools like BounceApp, Notable, and Skitch.
Everything else we found is screenshot-based or takes us out of the
browser. We wanted something that felt quicker than screenshots and
more integrated with the browsing experience.
Instead of taking a screenshot, MarkUp snapshots the DOM in the
current page, strips the javascript, and overlays a transparent DIV to
draw on. We used Raphael for the drawing tools. The server-side is
Node.js/Express.
What do you think? It's in beta and we'll be adding more features,
but we wanted to start getting feedback now.
Thanks