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An open source SIP phone for voice/video calls and instant messaging (mobile and desktop)
A high-level VoIP library implementing all SIP calling and IM features within a single API
A SIP server implementation with proxy, presence and conference modules
A powerful, lightweight streaming engine for voice/video telephony applications
A C library implementing Real-Time Transport Protocol
A modern library implementing SIP transport, transaction and dialogue layers
End-to-end encryption module for instant messaging, implementing the Signal Protocol
A VoIP anti-blocking solution to overcome VoIP blocking and firewall restrictions
A fully portable C99 implementation of both an encoder and decoder for the G.729 A/B codec