yEd's HTML Image Map Export with Embedded URLs and Descriptive Tooltips

Below you can see an image map that has been created using the HTML Image Map export feature of yEd.
The image is a composition of eight image tiles (PNG format) arranged 4 by 2. All non-blue nodes have URLs specified that are fully functional in the sense that when the node is clicked, your browser will transfer you to the website noted as the node's label.

Move your mouse over the nodes to see descriptive tooltips, or click the nodes to get transferred to the websites noted therein.