I. Spoon is a browser extension and server platform that allows apps to be run from Spoon's servers and virtualized in Spoon's ecosystem. It provides a browser sandbox and app library. II. Mouseflow is a click and movement analytics tool that generates heatmaps showing where users click and move their mouse on websites. It can be installed via JavaScript code or a WordPress plugin. III. The document discusses Internet Explorer compatibility issues and introduces the new X-UA-Compatible meta tag to control document rendering mode in IE versions.