Sip Softwares and Apps

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Jitsi

Open Source

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Empathy

Open Source

Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication over various IM protocols.

Linphone

Open Source

Linphone is a free voice over IP (VoIP) service and SIP client.

MicroSIP

Open Source

MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.

Ekiga

Open Source

Ekiga (GnomeMeeting) is a VoIP and video conferencing application for GNOME and Microsoft Windows.

Telephone

Open Source

Telephone allows you to make phone calls over the Internet or your company’s network.

CSipSimple

Open Source

CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP).

Asterisk

Open Source

Asterisk is a open source communications project that lets you create telephony apps for IP PBXs, VoIP Gateways, etc.