Wazo

Wazo is a unified communications platform based on Asterisk and focused on extensibility.

3CX Phone System

3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such…

An open source telephony switching and private branch exchange service for Linux.

AsteriskNOW is the fastest way to get started building custom telephony solutions with Asterisk.

Switch is a cloud-based phone system built for Google Apps users.

Dimelo, Unified management platform for your digital conversations

FreeSentral is a full IP PBX consisting of a Linux Distribution, an IP PBX and a Web Graphical User…

FusionPBX is an open source FreeSWITCH GUI.

Your Open Source Solution For Unified Comunnications And More…

Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under…

PBX in a Flash is a PBX system based on Asterisk, FreePBX and CentOS, coming as an ISO download.

Starfish PBX aims to be an open source alternative to Digium’s Switchvox.

Incredible PBX is a secure and feature-rich implementation of the Asterisk® PBX.

Brings voice and messaging to your web and mobile applications.

VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.

VoipSwitch provides complete VoIP and unified communications solutions.

FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).

OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server.