Browse free open source VoIP software and projects for Windows below. Use the toggles on the left to filter open source VoIP software by OS, license, language, programming language, and project status. LibreOffice is a free and powerful office suite. Word processor, spreadsheet, presentations, diagrams, databases, formula editors, charts, and more. Compatible with Windows, Mac, and Linux. Find the next step in your career. Find and apply for remote jobs and jobs in your area using the Slashdot Job Board. Browse by job, company, location, and more. 1 Open Source and Unified Communications partners created a new platform based on an Elastix fork currently purchased by 3CX to provide the community with continuity, peace of mind and support needed to continue with their PBX and operation developments. Contribute to the funding of Issabel on Downloads 2,514 This Week Last Update 22 hours ago See Project 2 Elastix Unified Communications Server Elastix is a software-based PBX powered by 3CX and based on Debian. An open-standards solution, Elastix is an easy to install and manage UC system compatible with popular IP phones, gateways and SIP trunks. Elastix is complete with unified communications features such as integrated WebRTC video conferencing, chat, presence and softphones and smartphone clients for Windows, Mac, iOS and Android. Downloads 469 This Week Last Update 2021-11-04 See Project 3 Ever wanted to cut out background noise when talking with others on Skype? Now it's possible! NoiseGator is a light-weight noise gate application that routes audio through an audio input to an audio output. In real-time the audio level is analysed and if the average level is higher than the threshold the audio bypasses as normal. However, if the average level goes below the threshold, the gate closes and the audio is cut. When used with a virtual audio cable it can act as a noise gate for a either a sound inputmicrophone or sound outputspeakers. Can also be used to gate noise from your own mic or play your microphone through your speakers. REQUIREMENTS - Java 7 or higher for Windows. - Java 6 or higher for Mac. Java 7 recommended. - A virtual audio cable is required for use with VOIPs For Windows users I recommend the VB-Cable driver Mac users can use SoundFlower. Downloads 759 This Week Last Update 2016-11-08 See Project 4 JDA Java wrapper for the popular chat & VOIP service JDA strives to provide a clean and full wrapping of the Discord REST api and its Websocket-Events for Java. This library is a helpful tool that provides the functionality to create a discord bot in java. Discord is currently prohibiting the creation and usage of automated client accounts We have officially dropped support for client login as of version Note that JDA is not a good tool to build a custom discord client as it loads all servers/guilds on startup, unlike a client which does this via lazy loading instead. If you need a bot, use a bot account from the Application Dashboard. Creating the JDA Object is done via the JDABuilder class. After setting the token and other options via setters, the JDA Object is then created by calling the build method. When build returns, JDA might not have finished starting up. However, you can use await ready on the JDA object to ensure that the entire cache is loaded before proceeding. Downloads 14 This Week Last Update 2023-06-04 See Project We help companies keep their networks and Internet connections secure. Our VPN service adds an extra layer of protection to secure your communications. We do this by applying strong encryption to all incoming and outgoing traffic so that no third parties can access your confidential information. Protect your organization against security breaches. Secure remote team access. Simplify business network security. Access region-specific online content from anywhere in the world 5 Open Source - GPLv3 inc images. *** PLEASE NOTE There are now 2 seperate versions here. *** One is Pre Firefox 57. The other is Post Firefox 57. *** For those providing mirrors, please enable your users to realize this. Vidalia Based, Tor as a Service Solution. MicroSip enables FREE PC to PC video calling with no account sign-up and no middleman server. WASTE enables FREE Conference VoIP, chat, file transfer and support. *** AI Powered *** Tor/i2p enables safer browsing. Tor/i2p Profile Browse over Tor/i2p on Firefox Vanilla, ESR, Waterfox Classic, New, Palemoon , LibreWolf and legacy CyberFox. As with all versions of Tor - do not rely on this for strong anonymity. A usability enhanced Privacy Pack. An installer, for Vista 32/64, Win7 32/64, Win8 32/64, Win10 32/64, Win11, Linux Wine Downloads 72 This Week Last Update 3 days ago See Project 6 Open Phone Abstraction Library OPAL is a C++ multi-platform, multi-protocol library for Fax, Video & Voice over IP and other networks. Also included is the Portable Tool Library PTLib which is a C++ multi-platform abstraction library and collection o Downloads 36 This Week Last Update 2 days ago See Project 7 Kiax is a softphone soft phone, VoIP client with a simple and comfortable user interface for making VoIP calls to Asterisk PBX. It depends on the iaxclient library to use Asterisk's IAX2 protocol for easy call configuration and audio setup. Downloads 19 This Week Last Update 2013-04-26 See Project 8 Asterisk Monitor is a HTML interface that acts a operator pannel for asterisk to display user/peer status and calls. This uses a reverse AJAX, PHP and Python to originate, transfer and hangup calls, manage queues and meetme rooms. Downloads 13 This Week Last Update 2016-07-20 See Project 9 New version This is the code to STUNTMAN - an open source STUN server and client code by john selbie. Compliant with the latest RFCs including 5389, 5769, and 5780. Also includes backwards compatibility for RFC 3489. ICE and WebRTC ready. Version compiles on Linux, MacOS, BSD, and Solaris. Supports the STUN protocol on both UDP and TCP for both IPv4 and IPv6. Windows binaries are also provided. Additional features are in development. This is a mirror of the code on More details on the project's website Downloads 51 This Week Last Update 2020-04-07 See Project Get Paid for Web SurfingCryptoTab Browser—an innovative browsing solution, combining the edgiest web technologies with the unique built-in mining algorithm. Try CryptoTab—the world's first browser with mining features. Earn bitcoin without looking up from watching videos, chatting, or gaming online. Join the community of more than 20 million users all over the world already enjoying CryptoTab Browser. 10 What is t38modem? From your application view point it's a fax/voice modem pool. From IP network view point it's a endpoint with fax support. From your view point it's a gateway between an application and IP network. Works with HylaFAX. Downloads 10 This Week Last Update 2017-01-12 See Project 11 mod_MumbleLink Positional Audio Communication for Minecraft with Mumble A Mod so that Minecraft now natively supports Mumble's positional audio feature. This means Directional and positionally attenuated VOIP in relation to the game world. Please visit the Forum for information about the newest Version! Main Forum-Thread TheSkorm's Fork on GitHub Mumble Donations are greatly appreciated Downloads 5 This Week Last Update 2015-08-17 See Project 12 Open Source - GPLv3 inc images. A WASTE client. Download and create your own WASTE networks. Move 1000's of GB's at 100MB+ per sec. 800 Mbits per sec FULL pause and resume capable. Voice Conference, Chat, Transfer files and Participate in Forums in a secure environment. For Windows XP 32/64, Vista 32/64, Win7 32/64, Win8 32/64, Win 10, Win 11, Linux WINE. *** User Based Access Control - for voice, chats, file transfers and uploads. useful in NULLNETS *** Distributed Autonomic-Performance-Tuning - A Goal-Seeking Swarming-Semiotic AI *** AI Connect - AI Managed Connections. *** Built-in Self-Organising Anti-Spoofing Technology *** Geared Multi-threading, providing the smoothest performance possible *** Advanced Threat Detect and Manage Technology *** Voice Conferencing Over WASTE Downloads 21 This Week Last Update 5 days ago See Project 13 The Asterisk .NET library consists of a set of C classes that allow you to easily build applications that interact with an Asterisk PBX Server version. Both FastAGI and Manager API supported. .NET/Mono compatible. Downloads 6 This Week Last Update 2013-02-03 See Project 14 jphonelite Java VoIP Softphone SIP replaced by jfPhone jphonelite is a Java SIP VoIP SoftPhone for Desktops Windows, Linux, Mac and Android. Features 6 lines with transfer, hold, conference up to all 6 lines, g711 u/a, g722, g729a, and video video support in Linux or Windows only and includes H263/H264/VP8. Applet includes full JavaScript support. STUN/TURN/ICE supported. Encrypt media with SRTP. DTLS Key Exchange. Video conferencing with jPBXLite/ NOTE THIS PROJECT HAS BEEN SUPERSEDED BY jfPhone. Please go to to get latest version. Downloads 4 This Week Last Update 2020-08-30 See Project 15 Intel Integrated Performace Primitives audio/video codecs plug-in for the OPAL/OpenH323 library including GSM-FR, GSM-AMR, and MPEG4 part 2. Downloads 3 This Week Last Update 2017-11-28 See Project 16 vTiger Freeswitch Integration by NYFON. Allows to perform outbound Click to Call and incoming wip calls from vTiger interface. Modified PBXManager allows to choose between Asterisk and Freeswitch for PBX integration. Same and extended in the future functionality as Asterisk interface. Downloads 5 This Week Last Update 2016-10-11 See Project 17 The project has moved! Please find current versions at The GNU Gatekeeper GnuGk is a full featured gatekeeper under GPL license. It supports VoIP and videoconferencing and includes Radius and database support and many call routing functions. The project has moved! Please find current versions at Downloads 3 This Week Last Update 2018-01-13 See Project 18 OfficeSIP Softphone and Messenger are two enterprise VoIP SIP clients written in C in .NET Framework. The SIP clients make use of Microsoft UCC API SDK, ensuring the highest quality of audio and video. Compatible with Office Communications Server. See also open source, cross-platform 1 simple messenger Brief Msg at 2 MUVConf is a multi-user video conferencing, see demo video download Downloads 3 This Week Last Update 2016-11-29 See Project 19 Jabbin is an Open Source social application that combines VoIP, Instant Messaging and Social Networking, allowing you to focus on what you really care about your friends. Downloads 6 This Week Last Update 2020-09-23 See Project 20 This is a web based instant 1 on 1 private online video conferencing solution. It's a solution for conducting easy to setup face to face meetings without leaving your office or home. It's the easiest and most cost-effective way to meet somebody and discuss one on one, to make a video call just by providing a private room access link. Downloads 3 This Week Last Update 2014-08-31 See Project 21 FATS - FATS is a Twisted and Fast Asterisk's Telephony Services. Project contains implementation of FastAGI, AMI protocols for the Twisted framework. Using it you can develop fast and pretty services for the Asterisk IP-PBX. Downloads 5 This Week Last Update 2013-04-18 See Project 22 Twisted Protocols for communication with FreeSWITCH PySWITCH is a Twisted Python library that allows you to communicate with FreeSWITCH using inbound and outbound EventSocket connections. Downloads 5 This Week Last Update 2015-09-21 See Project 23 The Mumble PHP Interface MumPI for short allows you to manage your Mumble servers via a webinterface. Users can register, upload textures, and retrieve account data. Admins can manage virtual servers, registrations, admin accounts, online users… Downloads 1 This Week Last Update 2016-01-30 See Project 24 PolycomVVXControl A command line utility for remote controlling Polycom VVX IP phones Application to remote control Polycom VVX IP phones via their web interface using HTTPS. This application is initially intended to perform certain actions on phones running in Microsoft Lync mode. These actions include * get device information * get status * sign in using PIN authentication * sign out * reboot * factory reset It also supports performing actions in batch reading data from a CSV file. Downloads 2 This Week Last Update 2016-06-03 See Project 25 This is a simple tool to map information for the cost of phone calls given by your VoIP provider, to the call log inside your Asterisk. As a result, you will know how much each of your employees has spent for phone calls. Additionally, this tool shows information about the assigned DID and CLIP numbers in Asterisk. This is helpful to identify obsolete, duplicate and multiple assignments. Downloads 3 This Week Last Update 2016-03-07 See Project