SIP Communicator - the Java VoIP and Instant Messaging client.
VoIP SIP SDK provides a powerful and highly customizable solution.
SIP Workbench is a graphical protocol analyzer and viewer.
Robust SIP ActiveX Phone is a powerful and robust SIP ActiveX phone client.
You can test VoIP network, SIP software or hardware.
Look 'n' Stop Firewall 2.07 is your defense against malicious internet trafic.
It checks internet trafic and allows/deny access conections on your computer.
TekSIP is a SIP Registrar and SIP Proxy for Windows.
E-Soft Billing (Pvt.) Ltd.
SIP Mobile Dialer is designed for small and mid size VoIP/SIP providers.
This software enables voice, video and IM sessions based on XMPP, SIP and IAX2.
Billion Online Technology Ltd.
BOL SIPPhone is the leading SIP dialer, available for private label and logo.
Finarea S.A. Switzerland
Enter your settings in SIP-device and call at the lowest rates available.
OctroTalk is an integrated instant messaging application VoIP call, SIP call etc.
A basic SIP Softphone that allows to connect to VoIP PBX and providers.
The new AGEphone Desktop 2 is SIP based internet telephony softphone.