Proceed by Jason Hood <[email]jadoxa@yahoo.com.au[/email]>.
Version 1.00 (8 December, 2012).  Freeware.
http://proceed.adoxa.cjb.net/

proceed [/A] [/T timeout] [/NOBREAK] [/P[:[text]]]
        [/C[S][I][:choices]] [/D default] [/N] [/NOESC] [/NOENTER]
        [/F[C|D|S] file]
        [/I drive]
        [[/S system | /SI | /SL] signal]
        [/M text] [/MS text] [/K] [/Q[M]] [/B]

none      pause
/A        beep
/T        seconds to wait
/NOBREAK  prevent key from interrupting wait
/P        pause; in conjunction with /T, wait and pause if key pressed
/C        choose a character from a list (default is "yn")
  S        match case
  I        return index, not character code
/D        choice if timeout occurs or Enter is pressed (default is first)
/N        do not show the choices
/NOESC    Escape will not cancel the choose
/NOENTER  Enter will not accept the default choice
/F        wait for file to be updated
/FC       wait for file to be created
/FD       wait for file to be deleted
/FS       wait for file to change size
/I        wait for drive to become idle
/S        send a signal to a specific computer
/SI       send a signal across the network
/SL       send a signal on the local computer, waiting for a receiver
signal    wait for or send this signal
/M        message to display during wait
/MS       message to display on receiving signal
/K        keep existing keys already in the keyboard buffer
/Q        remove what was displayed
/QM       remove the wait message, but keep the received message
/B        beep on file update, idle drive, received signal or no-break timeout

Choices are displayed as a comma-separated list; if /D was given, an asterisk
(*) indicates the default.  The default choice need not be in the list.
The message may contain:
        $c - list of choices (implies /N)
        $d - drive
        $f - file name
        $s - system which sent the signal
        $t - timeout count-down