What I think of allows you to view a webpage and essentially stick thoughts on it! A thought might look like a single arrow, or a series of posts. You can move each thought around to point at a particular part of a webpage. Find out more in How it works.
This site is a beta. It's an idea that's only realised part of its potential.
We're still developing the site and are always keen to talk to any party who's excited about reviewing, re-using or improving What I think of.