I just installed the 64bit beta (which isn't actually a beta) of Iconoid (Thanks for the reminder Jim). Seems to work fine, despite being 8 years old.

Proviso: Dual monitor system. Icons set to hide as needed, ie when mouse has been stationary for 10 seconds. At that point the icons and the taskbar on my primary screen disappear, but the taskbar on my second screen doesn't. No big deal. Everything returns when the mouse is moved.
If the icons are set to hide always they do just that, but the taskbar behaves as for hide as needed. The Taskbar hide can be adjusted seperately.
Also note that Iconoid is a true old-fashioned TSR and must remain running in background.

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Paul D