TERAVoice Server 

TERAVoice is a high-performance telephony platform for Windows that can implement any type of telephony application like voicemail, automated attendants, voice menus, waiting queues for call centers, H.323 to PSTN gateway and custom IVR applications.
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AnswerMyPhone 

AnswerMyPhone lets you use your PC as an Answering Machine for your telephone. It supports multiple voice mail box and creation of simple IVR. Records all incoming calls in real time, stores them as wave files for voicemail access & notify via email.
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Go4Customer Answering Machine 

answering machine which makes use of Voice Modem/Dialogic Cards.
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VTapi ActiveX 

VTapi ActiveX Control you get everything you need for quality communications using Microsoft Visual Basic, Visual C++, or any other environment capable of hosting ActiveX components. Create IVR systems, answering machines, detect caller ID and more!
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Interactive Voice Guide 

A powerful, easy-to-use system that quickly implements a professional voice response system into your business.
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