Ubuntu

Binary package “fspanel” in ubuntu xenial

  1. Xenial (16.04)
  2. fspanel

minimalist panel for X

 A panel for X that lists all your windows, while consuming minimal
 disk, memory, and screen space. It works under any GNOME compliant
 window manager (e.g. E, Sawfish, WindowMaker, IceWM, Oroborus) and
 supports KDE's mini icons (the KWM_WIN_ICON atom).

Source package