Alas, Goldhat is no more. But it lives on in /tap, the latest creation of Thumblab. For more information about how /tap supports the functionality of Goldhat see here.
/tap is a massively powerful and totally customizable note-taking system. Similar to a blank notebook, its strength comes from its simplicity. With a few special tools, you can build any type of note-taking system you want, complete with methods to track, organize, and visualize your ideas.