Callme
IP-CallMe v.1.1
Command-line messaging software to help you with your work. IP-CallMe is a command-Line messaging app with capability to execute pre-defined commands on server side.
Doddle WebPhone
Doddle is a free online SIP webphone through which you can make phone calls from within a webpage.It works with couple of VoIP providers or you can even fill it with your own SIP settings details.There is no desktop software to be downloaded at all.