pngquant(1) on Linux
The text 9a2c3da8930a, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
PNG image optimising utility
Flags it lists
-
-force -
-nofloyd -
-nofs -
-noquiet -
-ordened -
-verbose