sluice(1) on Linux
The text 664083eaa3f0, as Debian 10 (Buster) shipped it.
a tool to control data flow at a specified rate
Flags it lists
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-D -
-I -
-O -
-P -
-R -
-S -
-T -
-V -
-a -
-c -
-d -
-e -
-f -
-h -
-i -
-m -
-n -
-o -
-p -
-r -
-s -
-t -
-u -
-v -
-w -
-x -
-z