Sip Communicator

PocketSIPMsg is a SIP instant messaging client for small devices that use Windows CE.

developer Developer: pocketsipmsg.berlios.de
license License: GNU General Public License (GPL)
operating systems Operating System: Windows CE


SIP Express Router (SERi) is a high-performance, configurable, free SIP server licensed under the open-source GNU license.

developer Developer: iptel.org
license License: Freeware
operating systems Operating System: All


Net-SIP will implements all SIP protocol operation using EventMachine network back-end.

developer Developer: rubyforge.org
license License: Artistic License, GNU General Public License (GPL)
operating systems Operating System: Windows, Linux, BSD


ER or SIP Express Router is a very fast and flexible SIP (RFC3621) server.

developer Developer: iptel.org
license License: GNU General Public License (GPL)
operating systems Operating System: gcc = 2.9x; 3.[12] recommended, flex, bison, make, sed, tr,


Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification (see the feature table).

developer Developer: SourceForge.net
license License: Artistic License, GNU General Public License (GPL)
operating systems Operating System: Windows, Linux, Mac OS, BSD, Solaris


Session Initialtion Protocol (SIP) is widely used for telephone services over the Internet.

developer Developer: Cafesip
license License: Freeware
operating systems Operating System: Windows; BSD; Linux


Ekiga is a free Voice over IP phone allowing you to do free calls over the Internet.

developer Developer: Damien Sandras
license License: GNU General Public License (GPL)
operating systems Operating System: Linux


This script flys and animates a Mac Apple logo around your surfers' screen- and it only works in Netscape Communicator.

developer Developer: dynamicdrive.com
license License: Freeware
operating systems Operating System: All


SIPMethod Application Server (Community Edition) is a JSR-116/289 based SIP servlet container.

developer Developer: Sipmethod
license License: Freeware
operating systems Operating System: All


LuaSofia is a Lua binding of Sofia-Sip library.

developer Developer: Luasofia
license License: Freeware
operating systems Operating System: All


The first open-source XCAP server for SIP based softphones.

developer Developer: Xcapper
license License: Freeware
operating systems Operating System: All


4GSIP is an implementation of RFC 3261 compliant SIP protocol on top of AMPS library.

developer Developer: Sipstack
license License: Freeware
operating systems Operating System: All


Open Source IM and voice client using Jabber and SIP protocols, with great audio quality thanks to speex and a nice and clean interface.

developer Developer: Hecmeeting
license License: Freeware
operating systems Operating System: Windows; BSD; Linux


Radmind expects the root user to be able to write to all areas in the file system.

developer Developer:
license License: Freeware
operating systems Operating System: Not Available


Eliminate PBX headaches with 3CX IP Phone System.

developer Developer: 3cx.com
license License: Freeware
operating systems Operating System: All


CPLed is an OpenSIPS tool for editing CPL scripts in a friendly and easy graphical way.

developer Developer: Cpled
license License: Freeware
operating systems Operating System: Windows; Mac; Linux


SMILE is a Simple Middleware Independent LayEr, i.

developer Developer: Smile-code
license License: Freeware
operating systems Operating System: All


Web-based graphical user interface (GUI) for FreeSWITCH telephony switching platform.

developer Developer: Switchfreedom
license License: Freeware
operating systems Operating System: All


For now, you should probably visit http://sipp.

developer Developer: Demitasse
license License: Freeware
operating systems Operating System: All


AMPS (Asynchronous Middleware for Protocol Servers) is a design framework for building highly scalable concurrent servers especialy suited for telecom and networking domains e.

developer Developer: Amps-2007
license License: Freeware
operating systems Operating System: All