VaxVoIP Server SDK provides tools and components to quickly develop SIP (Session Initiation Protocol) based VoIP Servers and IP PBX systems for Banking, calling card companies, call centers and long distance telephony companies.
Express Talk is software that works like a telephone to let you make calls on your Mac OS X. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free.
Downloads: 100033 - Freeware - Download Now
Axon is a virtual PBX designed to manage calls within a business or call center environment. Any business can implement this scalable PBX solution with only an existing PC which connects to phone lines and extensions using VoIP technology.
Downloads: 75384 - Freeware - Download Now
Phone Validator - Phone Number Checkt - check phone numbers, national or international, mobiles, landlines/fixed lines, VoIP etc. (free for 100 phone numbers).
Downloads: 104482 - Freeware - Download Now