Helge HeßMacOSX Server 1.0 (/Rhapsody), the first Mac-ified versions of #NeXTstep, converted the non-menubar NeXTstep menus to the Mac style menubar. But you could still detach them from the menu bar into floating menus.
Lentil@helge I wish this was an option to enable still. I would also love an icon set like that for current macOS.