3CX VoIP Phone System for Windows Free edition is an Office Phone System/IP PBX that completely replaces a proprietary PBX, supports standard SIP soft/hard phones from any vendor, VoIP service providers & traditional PSTN phone lines. Developed for
VaxTele SIP Server SDK (Software Development Kit), allows software vendors and service providers to develop their own rich featured and reliable SIP (Session Initiation Protocol) based VoIP servers, IP-PBX, SIP PBX, SIP gateway. It is really easy to
VaxTele SIP Server SDK allows software vendors and service providers to develop their own SIP based VoIP Server, IP-PBX, SIP PBX, SIP gateway and IP-Telephony services.
A Windows free SIP IP PBX software. It is very easy to use and deploy, with powerful features like:ACD, Auto Attendant, Call Park, Ring Group, Conference, Call Pickup Group, Auto Outbound Dialer, Database CDR report, Database PBX Status Report.
4PSA VoipNow is the leading IP PBX server software for Service Providers and enterprise. Easy to use and deploy, 4PSA VoipNow softswitch helps you increase productivity and reduce voice communication costs. 4PSA Express free edition offers standard PBX
Voice2Phone Auto Dialer is a software phone broadcast system which helps you call in every phone number of your list using a VoIP service provider, Skype Connect, hardware or Software PBX including Asterisk IP PBX.
A complete IP-PBX in software.
Voicent Flex PBX is an easy-to-use software-based PBX system for small and large business alike. It supports both analog phone services and VOIP services.
3CX Phone System is an IP based PBX system that can totally replace a proprietary hardware PBX.
BizPBX is a Free Phone System (PBX) with Skype Trunk and Call Messenger, BizPBX is a Unified Communication PBX with Directory(online status), Conference, Call Record, Voicemail, CRM, Soft Fax, SMS, Internal EMail & Instant Messenger
This is a softphone application that allows you to connect to a variety of VoIP service providers, or to your own SIP compatible PBX.