dzen2(1) on Linux
The text 60831a9d0238, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
general-purpose messaging and notification for X11
Flags it lists
-
-bg -
-e -
-fg -
-fn -
-h -
-l -
-m -
-p -
-sa -
-ta -
-tw -
-u -
-v -
-w -
-x -
-xs -
-y