Fluxer is a free and open source instant messaging and VoIP chat app built for friends, groups, and communities.

Voice over IP (VoIP) enables voice communications over IP networks, including the internet. Instead of relying entirely on conventional telephone infrastructure, VoIP applications transmit audio as digital data. They can be used for everything from personal conversations to large business telephone systems. SIP is one of the most widely used signalling protocols for internet telephony. It allows compatible softphones, telephone systems and service providers to establish and manage calls. Other technologies, including WebRTC, support real-time voice and video communication through browsers and dedicated applications. Softphones allow users to make and receive calls using their computers, typically with a microphone, speakers or headset. Some support conventional telephone numbers through a SIP provider, while others use their own communication networks. Calls between compatible internet endpoints may be free, but calling ordinary telephone numbers generally requires a provider and may incur charges. For businesses, an IP-based Private Branch Exchange (PBX) provides facilities such as extension management, call routing, voicemail, interactive voice response, conferencing and call queues. Linux also offers powerful SIP proxies, media servers and other infrastructure for building communications platforms. Here’s our verdict captured in a legendary LinuxLinks-style ratings chart. Only free and open source software is eligible for inclusion here. Let’s explore the 20 VoIP software at hand. For each application we have compiled its own portal page, a full description with an in-depth analysis of its features, screenshots (where relevant), together with links to relevant resources. Start making free calls today. **VoIP Software** --- **Jitsi**| Innovative open source voice and video conferencing **Mumble**| Voice chat application for groups **Jami**| SIP-compatible softphone and SIP-based instant messenger **GNU Gatekeeper**| Feature-rich project that implements an H.323 gatekeeper. **Fluxer**| Instant messaging and VoIP platform **Kamailio**| Build large platforms for VoIP and realtime communications **FreeSWITCH**| Telephony platform for voice and chat driven products **Asterisk**| Complete PBX system **Wire**| Encrypted instant messaging client **Galene**| Easy to deploy videoconference server **Linphone**| Voice over IP softphone, SIP client and service **Janus**| General purpose WebRTC server **Baresip**| Modular SIP user-agent **OpenSIPS**| Mature SIP server **FusionPBX**| Multi-tenant PBX platform for managing VoIP communications **GOnnect**| Easy to use VoIP client **Calls**| Make phone and SIP calls **qTox**| Chat, voice, video, and file transfer IM client **FreePBX**| Web-based interface for managing Asterisk telephone systems **Flexisip**| Modular SIP server suite for VoIP and real-time communications his article has been updated to reflect the changes outlined in our **recent announcement**. LinuxLinks helps you discover the best free and open source software for Linux. Explore our extensive collection of **recommended applications** , including alternatives to popular proprietary software. We also publish software reviews, Linux tutorials, hardware reviews, free programming books and articles covering the wider open source community. Browse our **Linux resources** to discover more. Know a useful free and open source Linux application we haven't covered? **Suggest a program** for inclusion. Has your software been featured on LinuxLinks? Display one of our **Featured on LinuxLinks badges** on your website or GitHub README. ---

Voice over IP (VoIP) software enables telephone-like voice conversations across IP based networks. The post 20 Best Free and Open Source Linux Voice Over IP (VoIP) Software appeared first on LinuxLinks.

Instant messaging and VoIP application

Fluxer is a free and open source instant messaging and VoIP chat app built for friends, groups, and communities.

Voice over IP (VoIP) software enables telephone-like voice conversations across IP based networks. The post 20 Best Free and Open Source Linux Voice Over IP (VoIP) Software appeared first on LinuxLinks.

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