Amazing Visio is a toolset which improves drawings in Microsoft Office Visio.
Robust SIP ActiveX Phone is a powerful and robust SIP ActiveX phone client.
Billion Phone - compact convenient SIP phone software for making voice calls.
Enables voice connections to landline , cellular network and VoIP.
Myvoipapp Sip Phone is a usefull tolls easy to use.
The UML stencil for Visio supports complete UML, SoaML and other UML profiles.
Net2Phone SIP Dialer lets you make phone calls using your computer.
Configure SIP accounts, perform VoIP phone calls or initiate audio conferences.
A free SIP Softphone which offers PC-to-Phone service.
New generation phone system working in IP-networks using SIP protocol.
It enables you to make voice and video phone calls using SIP-based standards.
PortSIP Solutions, Inc.
PortGo Professional is a SIP-based phone for Windows desktop.
Frankcall provide PC to Phone, Mobile VOIP, Mobile SIP, Mobile Dialer services.
Nimbuzz - Call
Nimbuzz Phone is company's utility SIP caller for windows platform.