LanDial 

This program can be set to call divert number before dialing DUN and call a cancel number after so it works in UK etc. Also allows control of DUN dial / hangup over LAN with companion program LanMsg.
dun remote call divert redirect

DTMF 

DTMF dial is a software program designed to emit DTMF tones (including A, B, C and D) from the PC sound card. It has push button, keyboard, clipboard paste and command line interface.
network download tools sound card

DTMFDial 

Emits DTMF tones including A, B, C and D using PC sound card. Features programmable memory, last 16 number redial and single instance tool-tray operation.
dtmf tone sound

101 Contacts 

Kiss goodby to that slow XP dialer or the 4 speed dial limitation of the 98 dialer. 101 Contacts gives you 30 speed dial numbers. Each contact can also have an email address so you can dial or email from the same place.
dialer phone phone book address email speed dial contact contacts

Net Pal 

Net Pal is an Internet dialer that provides re-dial and automatic reconnect functions, allows a minimum connect speed to be specified, tracks your online time and cost, has a ping feature to keep your connection alive and auto-dials on demand.
netpal net pal net-pal internet dialer redial connection connect dial-up networking automate ras timer

Repeat Dialer 

If a number is busy, this program will recheck that number repeatedly for availability. You'll hear a ring signal when the line becomes free. You can redial on ring signals too. This is useful for radio contests and call-in television show voting.
redial redialer dialer repeat auto automatic call dial-up busy ring utility internet communications