gpsk31(1) on Linux
The text a686d446908b, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it. The page shows this text now.
A PSK31 mode communications program
Flags it lists
-
-c -
-d -
-h -
-v