en source means all source code is available!! Do not post any "free but not open" software here!
SIP Proxies
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Mini-SIP-Proxy A very tiny perl POE based SIP proxy
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MjServer cross-platform SIP proxy/registrar/redirect, written in java, based on MjSip stack
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MySIPSwitch SIP Proxy server which allows using multiple SIP accounts with a single SIP login
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NethidPro3.0.6 Opensource Sip Encryption Bridge: www.vonets.com
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Net-SIP A Perl SIP framework that includes a stateless proxy
- JAIN-SIP Proxy
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OpenJSIP Opensource distributed standalone SIP proxy, SIP registrar, SIP location service run by Java VM. Based on NIST SIP and derived from JAIN-SIP Proxy.
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OpenSBC: MPL licensed SIP proxy/registrar/B2BUA with NAT traversal and ENUM
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OpenSER: GPL SIP Server with TLS support - renamed to Kamailio
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OpenSIPS forked from OpenSER.
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partysip SIP proxy server
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SaRP SIP and RTP Proxy in Perl
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sipd SIP Proxy
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SIP Express Router (SER): the SIP router/proxy/jack-in-all-trades from IPtel.org
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Siproxd SIP and RTP Proxy
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SIPVicious tool suite: tools for auditing sip devices
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sipX The SIP PBX for Linux: Complete, native SIP PBX solution from SIPfoundry
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Vocal SIP softswitch with H.323 and MGCP translators for non-SIP endpoints
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Yxa Written in the Erlang programming language
SIP Clients (UA's)
Linux clients:
- Cockatoo
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Ekiga || SIP, H.323 audio and video softphone for various linux, solaris, windows, and various unix systems. Formerly GnomeMeeting
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FreeSWITCH: Console client for SIP, IAX2, Woomera and Jingle/Google Talk
- Kphone
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Linphone audio and video SIP softphone for Linux and Windows XP
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minisip cross-platform SIP softphone, Linux, Windows XP and soon Windows Mobile 2003 SE
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MjUA: simple cross-platform SIP softphone, written in java, based on MjSip stack
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Open IP Phone Business IP Phone sdk support, ims compliant, good interoperability.
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OpenSIPStack MPL licensed SIP stack with ENUM, Presence (XMPP/SIMPLE) and NAT traversal. Reference implementation of Session Border Controller (OpenSBC) available.
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OpenSoftphone: A simple Java based SIP softphone using the PjSip-jni wrapper.
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OpenZoep: GPL telephone and IM messaging client engine
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Peers Minimalist SIP softphone written in java (tested on linux and windows)
- PhoneGaim
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PJSUA: Command line SIP UA with SIMPLE, IM, call transfer, RTCP/RTCP, etc.
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QuteCom ex-OpenWengo: a fully SIP compliant multiplatform softphone with many features
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SFLphone, open-source multiplatform multi-protocol VoIP client
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Shtoom: SIP softphone in Python, runs on Windows, Mac, Linux
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SIP Communicator Audio/Video phone and messenger - Multiplatform - Open Source (also supports XMPP, MSN, AIM, Yahoo! and others).
- SipToSis from mhspot.com Skype SIP UA - Multiplatform - Open Source
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sipXezPhone ("sipX easy phone") from SIPfoundry based on sipXtapi
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sipXphone from SIPfoundry, previously known as the Pingtel phone
- Twinkle
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YateClient is multiprotocol and multiplatform softphone with H.323, SIP, Jingle and IAX support.
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YeaPhone: A SIP softphone for the Yealink USB-P1K handset based on the libLinphone backend
MacOS X clients:
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Blink: It supports wideband VoIP, Instant Messaging, File Transfer and Desktop Sharing based on MSRP
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FreeSWITCH: Console client for SIP, IAX2, Woomera and Jingle/Google Talk
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PJSUA: Command line SIP UA with SIMPLE, IM, call transfer, RTCP/RTCP, etc.
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QuteCom ex-OpenWengo: a fully SIP compliant multiplatform softphone with many features
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SFLphone, open-source multiplatform multi-protocol VoIP client
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Shtoom: SIP softphone in Python, runs on Windows, Mac, Linux
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SIP Communicator Audio/Video phone and messenger - Multiplatform - Open Source (also supports XMPP, MSN, AIM, Yahoo! and others).
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SipToSis from http://www.mhspot.com Skype SIP UA - Multiplatform - Open Source
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Telephone: A SIP softphone designed for the Mac (written in Objective-C/Cocoa). Very good integration with Mac OSX : Dial from Addressbook, dial tel: URIs from Safari, notifications with Growl.
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YateClient skinnable VoIP client based on QT library which supports H.323, SIP, Jingle and IAX protocols
Windows clients
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Ekiga || SIP, H.323 audio and video softphone for various linux, solaris, windows, and various unix systems. Formerly GnomeMeeting
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FreeSWITCH: Console client for SIP, IAX2, Woomera and Jingle/Google Talk
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JPhone Rich software SDK support softphone development, Windows, Linux, ThreadX, Vxworks etc.
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Linphone audio and video SIP softphone for Linux and Windows XP
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minisip cross-platform SIP softphone, Linux, Windows XP and soon Windows Mobile 2003 SE
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MjUA: simple cross-platform SIP softphone, written in java, based on MjSip stack
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OfficeSIP Messenger is audio-video softphone and instant messenger, open source alternative to MS Office Communicator.
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OfficeSIP Softphone GPL audio-video softphone.
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OpenSIPStack MPL licensed SIP stack with ENUM, Presence (XMPP/SIMPLE) and NAT traversal. Reference implementation of Session Border Controller (OpenSBC) available.
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OpenZoep: GPL telephone and IM messaging client engine
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Peers Minimalist SIP softphone written in java (tested on linux and windows)
- PhoneGaim
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PJSUA: Command line SIP UA with SIMPLE, IM, call transfer, RTCP/RTCP, etc.
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OpenSoftphone: A simple Java based SIP softphone using the PjSip-jni wrapper
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QuteCom ex-OpenWengo: a fully SIP compliant multiplatform softphone with many features
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Shtoom: SIP softphone in Python, runs on Windows, Mac, Linux
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SIP Communicator Audio/Video phone and messenger - Multiplatform - Open Source (also supports XMPP, MSN, AIM, Yahoo! and others).
- SipToSis from mhspot.com Skype SIP UA - Multiplatform - Open Source
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sipXezPhone ("sipX easy phone") from SIPfoundry based on sipXtapi
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sipXphone from SIPfoundry, previously known as the Pingtel phone
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VMukti (formerly 1videoConference) alpha: a web2.0 VoIP video conferencing software for Asterisk.
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wxCommunicator Windows softphone based on sipXtapi and wxWidgets 2.8.x, multi-account, conferencing, NAT support
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YateClient is multiprotocol and multiplatform softphone with H.323, SIP,Jingle and IAX support.
SIP tools
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Callflow: Generates SIP Call Flow diagrams
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miTester for SIP: SIP testing tool; Automates test execution.
- Open Source Asterisk AMI: Open Source Asterisk AMI interface application
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pjsip-perf: SIP transaction and call performance measurement tool
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PROTOS Test-Suite: SIP Testing tools
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SFTF: SIP Forum Test Framework - a SIP UA test suite primarily targeted at UA software developers hosted by SIPfoundry
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SIP-CallerID: SIP Caller ID retrieval and lookup
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SIPbomber: SIP proxy testing tool
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SIP SIMPLE Command Line Tools for SIP sessions (complete console based SIP UA) and SIMPLE Presence (Publish, Subscribe, Notify) and XCAP document manipulation
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Sipp: SIP performance tester
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Sipper: SIPr (called Sipper) is an open source and a comprehensive SIP application testing framework. Generate any call flow in minutes.
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SIP Proxy: SIP security testing tool.
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Sipsak: SIP testing tool
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SIP Soft client: Software development kit for SIP Softphone
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SIPVicious tool suite: tools for auditing SIP devices
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SMAP: Locating and fingerprinting remote SIP devices
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Vovida.org load balancer: SIP Load Balancer
SIP Protocol Stacks and Libraries
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Aloha Spring based J2SE SIP A/S which leverages optimistic concurrent model and supports multiple persistence models
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eXosip - eXtended osip library
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Juphoon SIP Stack Rich software SDK support SIP, SDP, XML, RTP/RTCP, HTTP, STUN, ABNF etc. Support Windows, Linux, ThreadX, Vxworks etc.
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libdissipate SIP stack
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minisip includes a SIP stack
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MjSip - complete and powerful java-based SIP library for both J2SE and J2ME platforms.
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MSRP Library - MSRP protocol (RFC4975) and its relay extension (RFC4976) written in Python
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NIST SIP Various SIP appications and tools in Java
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Open Sip Stack MPL licensed SIP stack with ENUM, Presence (XMPP/SIMPLE) and NAT traversal. Reference implementation of Session Border Controller (OpenSBC) available.
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oSIP Library SIP Library
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OSP client protocol stack and SIPfoundry
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PhClickDial - Verona based Active/X plugin for IE allowing ClickToDial functionallity
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PJSIP: Small footprint, high performance, and ultra-portable SIP stack written in C, and has language binding for Python. Works on smartphones (Symbian, Windows, iPhone/iOS, Android) as well as desktops and support ZRTP encryption.
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reSIProcate SIP stack and sample Application from SIPfoundry
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SailFin Adds SIP support the the Java GlassFish Application Server
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sipXtackLib an RFC 3261, 3263 complient SIP stack from SIPfoundry
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http://sofia-sip.sourceforge.net Sofia-Sip is SIP stack implementation with STUN and presense support
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SIP SIMPLE client SDK - High level middleware on top of SIP, RTP, MSRP and XCAP protocols
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Twisted Python protocol stacks and applications includes SIP support
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Verona - GPL licenesed VOIP engine based on oSIP,eXosip,oRTP,ffmepg, works on Linux,Windows Mac-OS/X
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Vovida SIP Vovida SIP stack
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XCAP Library - XCAP client library written in Python
- YASS - Statefull SIP stack used in Yate written in C++ usable for client, server or proxy in a multithread or single thread model. It's working on both Windows and Linux, it's very small but full featured.
H.323 Clients
Linux clients:
MacOS X clients:
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FreeSWITCH: Console client using OPAL
- ohphoneX
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YateClient skinnable VoIP client based on the QT library which supports H.323, SIP, Jingle and IAX protocols
Windows clients:
H.323 Gatekeeper
IAX clients
RTP Proxies
RTP Protocol Stacks
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ccRTP C++ library based on GNU Common C++
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Juphoon RTP Stack Rich software SDK include RTP/RTCP stack. Support Windows, Linux, ThreadX, Vxworks etc.
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JRTPLIB C++ object oriented RTP library
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libRTP part of gnome-o-phone
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libzrtpcpp - ZRTP extension library for ccRTP stack
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LIVE.COM Streaming Media includes C++ RTP stack
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oRTP Written in C, running on linux, win32 and arm-linux.
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PJMEDIA: Small footprint media stack with a tiny RTP/RTCP stack suitable for DSP or embedded deployment
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RTPlib C library
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sipXmediaLib RTP + audio bridges, audio splitters, echo suppression, tone from generation (e.g. DTMF), streaming support, RTCP, G711 codecs, etc. from SIPfoundry
- Secure RTP - see: SRTP
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UCL Common Multimedia Library includes cross platform RTP stack
- Vovida RTP Stack
- YRTP - Yate RTP stack, that can be used in other projects.
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zrtp4j - ZRTP stack for Java, based on GNU ZRTP, used in SIP Communicator
MSRP Relays
XCAP servers
Other tools
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Encours Teleconferencing in your web browser with an integrated VOIP layer (Java) and an optional Asterisk connectivity on the server side.
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Howler Technologies - optimised G.729 codec for softswitch market.
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MORCC - automated online Calling Card store. Paypal integrated.
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OgonPhonesXML .NET Library for Aastra SIP Phones and Cisco SIP/IP phones for fast and easy XML Interfacement.
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Oreka capture and retrieval of SIP, Cisco Skinny (SCCP) and raw RTP sessions with audio compression, rdbms metadata storage and web based user interface.
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Vovida.org STUN server: A STUN server
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Voipong - Voice over IP (VoIP) sniffer and call detector.
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Vomit converts a Cisco IP phone conversation (recorded with TCPdump) into a standard WAV file
PBX platforms
Some of these include SIP proxy functionality
IVR platforms
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Asterisk: Open Source PBX with built-in IVR server
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Bayonne: GNU project IVR server
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CT Server Perl based Open Source client/server library supporting Voicetronix Telephony hardware.
- FreeSWITCH
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OpenVXI: Implementation of VoiceXML
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SEMS: Free/Open Source SIP media server with IVR capabilities
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sipX PBX The SIP PBX for Linux (open source) with built-in IVR (voice mail & auto-attendant)
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YATE Yet Another Telephony Engine
- See Also: VoiceXML
Voicemail servers
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Asterisk: Open Source PBX with built-in Voicemail Server
- FreeSWITCH
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Lintad: Linux Telephone Answering Device - A Voice and Faxmail Server
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OpenPBX: Open Source PBX with built in voicemail
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OpenUMS: Linux Voicemail and Unified Messaging Server
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SEMS: Free/Open Source SIP media server with built-in Voicemail and Voicebox Server
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sipX PBX The SIP PBX for Linux (open source) with built-in IVR (voice mail & auto-attendant)
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VOCP: A Voicemail Server for voice modems
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YATE Yet Another Telephony Engine with H.323, SIP and IAX support.
Speech
Text-to-speech and speech-to-text (voice recognition)
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Festival: Voice synthesis system (implemented with a trainable neural network)
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OpenSALT: Implementation of SALT
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OpenVXI: Implementation of VoiceXML
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Sphinx: speaker-independent speech recognizer
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UniMRCP: cross-platform MRCP client and server
Fax Servers
Development platforms, protocol stacks
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H323plus: Open Source H.323 Protocol Stack following on from the original openH323
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OpenBloX: OpenBloX Open Source Java Diameter framework with all IMS and SIP servers interfaces; maintained by Traffix Systems,
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OpenMGCP: Open Source MGCP Protocol Stack Developed with C and POSIX APIs,
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OpenSS7: SS7 Protocol Stack
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ooh323c: Open Source H.323 Protocol Stack Developed in C
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++Skype C++ library for skype add-on platform independent software development. It is platform independent, easy to use, and easy to extend because of the flexible library design, inspired by modern C++ design ideas. Performance is one of the goals.
Radius Servers
Billing
Codecs
Middleware
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Ernie: Open Source Python based applications platform for VoIP and presence based applications
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Mobicents: The most popular Open Source Service Logic Execution Environment (JSLEE) and SIP Application Server for the Java platform.
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TALK: Web based CTI Solution (AJAX client) which provides call control, presence and directorty features.
Suite Solutions
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Zoontelecom: Zoon Suite is a Open Source solution for make VoIP services with billing and more. (Spanish)
CTI Dialer utilities
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Asterisk phonebook A common shared phone book directory for Asterisk PBX
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TALK Powerful directory management and scalable architecture to create Click to call or Select and Dial applications + AJAX libraries to implement these features in your web site.
