Free and open-source SIP/VoIP Client

csipsimple will allow native sip for android device.

It relies on the pjsip SIP stack and use the pjsip-jni project. The use o ...

TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees ...

Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the ...

Encrypted secure Calls with CallProtector!

App available on iOS & Android With CallProtector you can call others in a secu ...

KeeperChat - The leading secure messaging app. • Private vault for messages, photos and videos • Private, encrypted media gall ...

Linphone is an internet phone or Voice Over IP phone (VoIP). With Linphone you can communicate freely with people over the int ...