Sip Forwarder

OfficeSIP Messenger provides enterprises with advanced instant communications for free. Compatible with Office Communications Server 2007, OfficeSIP Messenger delivers reliable performance combined with trouble-free deployment and management. Supporting text, voice and video chats, the free... Platforms: Windows

SipExchange is an open-source softswitch that provides standard SIP services like registration, presence and proxy. Using the SipExchange application, service providers can offer telephone services to their subscribers as well as other services based on voice, video and instant messaging.... Platforms: *nix

pcapsipdump is libpcap-based SIP sniffer with per-call sorting capabilities. It writes SIP/RTP sessions to disk in a same format, as "tcpdump -w", but one file per SIP session (even if there is thousands of concurrent SIP sessions). Platforms: *nix

SipUnit provides a test environment geared toward unit testing SIP applications. SipUnit project extends the JUnit test framework to incorporate SIP-specific assertions, and it provides a high-level API for performing the SIP operations needed to interact with or invoke a test target. A test... Platforms: *nix

PJSIP and PJMEDIA is the Open Source, high performance, small footprint SIP and media stack written in C language. It has many SIP and media features such as a layered API, dialog usages, high level invite session abstraction, an event framework, SIP presence/SIMPLE, instant messaging,... Platforms: *nix

Oreka is a modular and cross-platform system for recording and retrieval of audio streams. Oreka project currently supports VoIP SIP and sound device based capture. Recordings metadata can be stored in any mainstream database. Retrieval of captured sessions is web based.. Platforms: *nix

astGUIclient is a GUI client application for the Asterisk open-source PBX. This is a suite of programs that are designed to interact with the Asterisk Open-Source PBX Phone system at a client computer level to extend the functionality of your phone and system. The suite of software is... Platforms: *nix

Zfone uses a new protocol called ZRTP, which is better than the other approaches to secure VoIP, because it achieves security without reliance on a PKI, key certification, trust models, certificate authorities, or key management complexity that bedevils the email encryption world. Zfone also... Platforms: *nix

The Wengophone is an easy to use program, that enables you to call anyone, anywhere, anytime, for free. Its native use of the SIP protocol makes it interoperable with most on the known VoIP technologies. WengoPhone already has built-in video capabilities, and is will offer many more features in... Platforms: *nix

Linphone is a web phone that it let you phone to your friends anywhere in the whole world, freely, simply by using the internet. The cost of the phone call is the cost that you spend connected to the internet. To call somebody, you must provide to linphone a SIP URL : It is something like... Platforms: *nix

Siproxd is a proxy/masquerading daemon for the SIP protocol. It handles registrations of SIP clients on a private IP network and performs rewriting of the SIP message bodies to make SIP connections work via an masquerading firewall (NAT). Siproxd project allows SIP software clients (like... Platforms: *nix

VoicePhone is a softphone to make international calls to fixed and mobile phones over the Internet. *** Working with several SIP providers *** Configurable rules to select appropriate SIP account based on the destination of a call A SIP provider may offer different cost of calls based on... Platforms: Windows

A multi-platform IAX and SIP softphone, compatible with the Asterisk platform and any SIP-capable system in general. It is available in Free and Biz editions. Zoper Free offers the following advanced features: - D?.38 fax receiving support (for SIP) - STUN support - Various codec support... Platforms: Mac

TekFax is a SIP T.38 Fax Receiver Server for Windows. TekFax tested on Microsoft Windows XP, Vista and Windows 2003 server. TekFax complies with RFC 3261. It supports ITU T.38 protocol and UPnP for NAT traversal. You can select IP address to be listened, default SIP proxy for outgouing calls.... Platforms: Windows

VoIPdito Hosted PBX allows your business be more productive without the expense of buying and managing on-site telephone system. All enterprise features at a small price. # Why VoIPdito? * Ease of use * Increased productivity * Instant deployment * Lower telecommunication costs * No upfront cost... Platforms: Windows

Ekiga (formely known as GnomeMeeting) is an open source SoftPhone, Video Conferencing and Instant Messenger application over the Internet. It supports HD sound quality and video up to DVD size and quality. It is interoperable with many other standard compliant softwares, hardwares and service... Platforms: Windows

Full featured VOIP softphone based on the open standard SIP protocol. With MizuPhone you can connect to any SIP (proxy and/or registrar) server on the public internet or on your local area network. MizuPhone tries to combine the SIP compatibility with P2P inteligence and an intuitive GUI. It is... Platforms: Windows

Blink is elegant, simple to use and feature-full Blink is the best SIP client for Mac. You can use it with any SIP provider or its own fully-featured SIP service. Blink is a fully featured and easy to use SIP client. Blink offers Rich Multimedia Communications based on SIP protocol using... Platforms: Mac

dore Softphone delivers SIP-based communications and services for PC-to-Phone and PC-to-PC services surrendering the world at your desktop. The Softphone allows a person to communicate over Internet with any desktops, notebooks, PDAs, stand-alone IP-phones and even with any conventional landline... Platforms: Windows

Blink is elegant, simple to use and feature-full You can use it with any SIP provider or its own fully-featured SIP service. Blink is a fully featured and easy to use SIP client. Blink offers Rich Multimedia Communications based on SIP protocol using Future Proof Addressing in the form of... Platforms: Linux