Sip

Distributed SIP Analyzer is a SIP protocol analyzer for Unix.It allows you to examine SIP from different local area network.You can interactively browse the capture data, viewing callflow sequence diagram and detail information for each SIP Session. Platforms: *nix

Free VOIP / SIP phone. Use your PC as a phone. Works with any SIP / VOIP provider/ phone service. Use instead of the soft phone provided by your VOIP provider which locks you into their VOIP phone service. Easy to use interface to transfer, forward calls or set-up conference calls. Call log, call... Platforms: Windows

Eliminate PBX headaches with 3CX Phone System for Windows! Evolve your communications with 3CX Phone System for Windows - an office phone system/IP PBX that completely replaces your proprietary PBX, supports standard SIP soft/hard phones, VOIP services and traditional PSTN phone lines. 3CX... Platforms: Windows

Sponsor popup windows driving you nuts while you are browsing the web? SIP takes them OUT with extreme prejudice! Very low CPU useage, you won't even know its running. Dumps its kill list out to a text file so you can distribute it to friends. Comes with a working initial list as a starting... Platforms: Windows

Doddle is a free online SIP WebPhone through which you can make phone calls from within a webpage. It works with couple of VoIP providers or you can even fill it with your own SIP settings details. There is no desktop software to be downloaded at all. It just uses Java plugin( JVM ) which... Platforms: Windows, *nix

Doddle is a free online SIP WebPhone through which you can make phone calls from within a webpage.It works with couple of VoIP providers or you can even fill it with your own SIP settings details. There is no desktop software to be downloaded at all. It just uses Java plugin( JVM ) which... Platforms: Windows, *nix

Jiplet is short for Java SIP Servlet. Jiplet Container project is an open-source container for server-side SIP applications. An application developer can create a SIP application written in Java using the Jiplet API and deploy the application in the container. The container provides a number of... Platforms: *nix

nagios-check_sip plugin will test a SIP server/device for availability and response time.. Platforms: *nix

SSIP-GST Gaim plugin is an open-source SIP/SIMPLE plugin library, compliant with the IETF RFC3261 specification. SSIP-GST plugin serves as an example GUI client for the Sofia-SIP library. It can be used with Gaim as a SIP client software for uses such as VoIP, IM and presence. Media support is... Platforms: *nix

OpenSER is a collaborative project of its users, to develop a scalable and robust SIP server. Anyone can contribute to one of next items: - code development - OpenSER core, modules and adjacent applications - documentation- writing or enriching documentation - miscellaneous - different... Platforms: *nix

Enigma is a free Session Initiation Protocol (SIP) softphone available for your download. It can used to make Internet calls, establish conference and send instant messages to your buddies under the same SIP network. Choose your platform see features So whether your just having a simple voice... Platforms: Windows

MizuPhone is a SIP Client for Windows which lets you make VoIP/SIP calls to users anywhere in the world using any VoIP service provider, SIP server or your own PBX. Features: -Easy to use, zero-touch configuration -Multiple profiles, multiple lines -Superior voice quality with audio... Platforms: Windows, Windows 8, Windows 7, Windows Server

MizuPhone for iOS is a customizable VoIP softphone for iPhone and iPad which can be used with any softswitch or PBX using the industry standard SIP and RTP protocols. All common VoIP features are included making this software a suitable solution for all VoIP business needs. The customized version... Platforms: *nix, iPhone,iPod,iTouch,Handheld/Mobile Other

With the MizuDroid free softphone for Android you can make VoIP calls to users anywhere in the world using any VoIP service provider, SIP softswitch or your own PBX. Features include clear voice quality using industry standard codec such as G.729 and wideband codec, auto configuration, VoIP... Platforms: *nix, Android, Handheld, Other,Java,RIM

A freeware program designed to query DNS for the ENUM NAPTR mapping between a telephone number and a SIP, H323, IAX2 or other URI. Use with VOIP systems to check your e.164 or freenum or other mappings. This program queries each DNS assigned to your system (or specifc user defined DNS) using the... Platforms: Windows

MicroSIP - open source portable SIP softphone based on PJSIP stack for Windows OS. It allowing to do high quality VoIP calls (person-to-person or on regular telephones) via open SIP protocol. From cloud of SIP providers you can choose best for you, register account and use it with MicroSIP.... Platforms: Windows

Freeware Windows SIP softphone for making voice calls using your PC. Platforms: Windows

Free VOIP / SIP phone (softphone) for Windows. Use your PC as a phone. Works with popular VOIP providers and SIP PBX's (including 3CX Phone System). The interface is easy to use and similar to that of popular Smartphones. 3CXPhone is compact and easy to install across a network. Features include... Platforms: Windows

Mizu VoIP Server is an all in one enterprise grade softswitch solution with support to SIP and H.323. All Class5 features including sophisticated routing, access rules, CDR record generation, billing and accounting and offers full compatibility with your SIP infrastructure. Highlights:... Platforms: Windows, Windows 8, Windows 7, Windows Server

SIPp is a free Open Source test tool / traffic generator for the SIP protocol. It includes a few basic SipStone user agent scenarios (UAC and UAS) and establishes and releases multiple calls with the INVITE and BYE methods. It can also reads custom XML scenario files describing from very simple... Platforms: Windows