CapiFax 

CapiFax is an ISDN-based network fax solution for 2 to 30 connections at one time. Each ISDN MSN/DDI (local number) can be configured for one network client so each workstation has a private number.
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ShareISDN 

You can use ShareISDN to share the functions of an ISDN-Card with other users in a network. For example, every person within a company can send faxes, transfer files or access the Internet via one single ISDN-Card.
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PC-Telephone 

Make FREE pc-to-pc and cheap pc-to-phone, pc-to-fax, phone-to-pc, fax-to-pc calls over Internet or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, ISDN phone, answer phone, fax, voicemail, callerID, conferencing, etc
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Moony 

Moony is an ISDN call monitor program. which displays a caller's phone number (and name) for incoming calls. Other highlights are telephone answering machine, fax (send and receive), SMS notification and network support.
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Phoner 

Phoner is a free softphone for ISDN and VoIP telephony. An answering machine and Text-To-Speech support complete the large package.
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Throttle 

Throttle is a tool for all that allows you to modify your modem settings to increase internet performance up to 200% or higher!! No modifications to your hardware are made and all adjustments and settings are done in an easy to use interface.
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