
Telephone
Open SourceTelephone allows you to make phone calls over the Internet or your company’s network.
Discover best Sip Mac OS X softwares, apps and websites.
Telephone allows you to make phone calls over the Internet or your company’s network.
Blink is the best real-time communications client using the SIP protocol.
X-Lite is a freeware VoIP soft phone that uses the Session Initiation Protocol.
Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.
Linphone is a free voice over IP (VoIP) service and SIP client.
Asterisk is a open source communications project that lets you create telephony apps for IP PBXs, VoIP Gateways, etc.
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.