pcapsipdump -
0.2 (pcapdsipdump is a tool for recording voip calls)
re -
0.4.0 (Libre is a portable and generic library for real-time communications with async IO support and a complete SIP stack with support for SDP, RTP/RTCP, STUN/TURN/ICE, BFCP and DNS Client)
restund -
0.4.0 (Restund is a modular and flexible STUN and TURN Server, with IPv4 and IPv6 support)
sipsak -
0.9.6_p1-r2 (small command line tool for testing SIP applications and devices)