I’m not a huge fan of those visual tooltip applications no matter if they are integrated in the operating system or in other applications like Opera. The main reason for me personally was that I never had enough windows or tabs opened that I would need a visual tooltip to find the one I was looking for. Another reason was that those applications seemed to use a fair share of the system resources to display this graphical gimmick.
At least the second point of criticism has changed with the discovery of Visual Tooltip. That application is using less than 4 Megabytes of memory when its actively running which is pretty good for such a software.
Visual Tooltip does not need to be installed and can be run from the directory it was unpacked to. It adds an icon to the Windows system tray which offers access to the program’s options which are opened automatically during first start.