KakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service)
South Korea
Tinfoil Chat (TFC) is a FOSS+FHD peer-to-peer messaging system that relies on high assurance hardware architecture to protect users from passive collection, MITM attacks and most importantly, remote key exfiltration.
United States
Phoner provides business owner, sales people, lawyers, doctors, police officers and others with a second phone number to protect their identity and also gives the convenience of multiple phone numbers on one device.
United States
Softphone for VoIP, CAPI und TAPI. This application enables voice connections to landline, cellular network and VoIP. Phoner can be used as softphone on stationary and mobilecomputer devices attached to anlogue or digital (ISDN) subscriber lines and as SIP client.
PhonerLite is.
Germany
EU
VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is a pure web application based on WebRTC that can provide communication features within your web browser.
SpainEU
yaxim Feb 7th, 2013 yaxim (Yet Another XMPP Instant Messenger) is a Jabber/XMPP client with open source (GPLv2). Why pay for text messages if you …
GermanyEU
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...
FranceEU
Emoty is a messaging application with emphasis on simplicity, freedom and safety. It's a client for RetroShare network, hence use the same decentralized, Friend-to-Friend network structure with end-to-end encryprtion.
Unlimited free calls anywhere in North America!
KNCTR gives you the ability to stay connected with the people that matter most. Call any mobile or landline phone number across North America, absolutely FREE! All you need is a headset plugged into your computer, an Internet conne.
QQ is a widely used Chinese instant messaging service developed by Tencent, offering chat, voice, and video communication. It integrates social networking features like groups, forums, and customizable avatars to enhance user interaction.
China
