1.Kamailio.org
Rank:400,579
Worth:$4,400
Welcome To Kamailio - The Open Source SIP Server Kamailio® (successor of former OpenSER and SER) is an Open Source SIP Server released under GPLv2+, able to handle thousands of call setups per second. Kamailio can be used to build large platforms for VoIP and realtime communications - presence, WebRTC, Instant messaging and other applications. Moreover,