Linphone is described as 'Is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features' and is a very popular instant messenger in the social & communications category. There are more than 50 alternatives to Linphone for a variety of platforms, including Android, iPhone, Windows, Mac and iPad apps. The best Linphone alternative is Jami, which is both free and Open Source. Other great apps like Linphone are SimpleX Chat, Jitsi Desktop, Molly and FluffyChat.
MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack. It allowing to do high quality VoIP calls (P2P 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. You'.
Speek! is the first messenger that is anonymous and censorship-resistant by design. Speek! messenger encrypts all messages and is secure, private and decentralized.
Zoiper IAX & SIP multilanguage and multiplatform (Windows, Linux and Mac OS X) softphone is a VoIP soft client, meant to work with any IP-based communications systems and infrastructure.
TeleGuard is the data-secure messenger from Swisscows. TeleGuard encrypts every message and all telephone calls with encryption algorithm currently available: SALSA 20. TeleGuard servers are located in Switzerland, they are not subject to the data protection laws of the EU /...
This project won the first prize 🥇 at Telegram Lightweight Client Contest and now is an official Telegram client available to anyone at web.telegram.org/a.
Sphinx.chat lets you use your lightning node to talk to anyone else who is running lightning and a sphinx compatible chat client.
QuteCom is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship product of the QuteCom project is a softphone which allows you to make free PC to PC video and voice calls, and to integrate all your IM contacts...
Thoughtfully designed, Bria leverages over 10 years of softphone experience in improving productivity for our customers.
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