Key free SIP components maintained by iptel.org include:
- SER [1]-- SIP Express Router, RFC3261 SIP proxy
- SEMS [2]-- SIP Express Media Server
- SERweb [3]-- web interface to SERi [4]
- RTP Proxy [5] -- media relay for NATi [6] traversal (courtesy of Maxim Sobolev)
- SER command-line tools [7]: seri [8]_* (ser_ctl, ser_cred, ser_rpc, ser_user, ser_attr, ser_domain, ser_uri)
- mystun [9] -- STUN server
Besides that, many third-party free tools have been reported to be used along with iptel.org SIP software.
- Accounting
- CDR Tool [10] tool for CDRi [11] postprocessing
- OSP Toolkit [12]
- Command-line tools
- pua [13] -- command line presence UA
- SER command-line tools [14]: ser_* (ser_ctl, ser_cred, ser_rpc, ser_user, ser_attr, ser_domain, ser_uri)
- Embedded
- milkfish [15] -- home router
- NATs
- SIP connection tracking [16]
- PSTNi [17]
- Asterisk [18]-- popular open source PSTN gateway
- Security
- sipcrack [19] tool for dictionary attacks
- sipbot [20]
- smap [21]port scanner
- protos [22]buffer overflow testing tool
- Tactical VoIP toolkit [23] - VoIPi [24] security assessment tool
- see also Mohamen Nassar's list of further security tools [25], and VOIPSA's security tool list [26].
- Stacks
- sofia-sip [27]
- pjsip [28]
- Testing
- sipp [29] performance stress tool
- seagull [30] -- IMSi [31] traffic generator
- Troubleshooting
- ethereal [32]tool for capturing VoIP (and other) traffic and analyzing it
- routegraph [33] -- creates call graphs for SER configuration files
- SIP Analyzer [34]
- SIP v6 analyzer [35]
- sipgrep [36]-- filtering of SIP messages
- sipsak [37] traceroute-like tool for SIP (with many other features); also easy to integrate into monitoring applications such as argus [38], nagios [39]
- sipscenario [40]tool for generating HTML-ized traces of SIP messages
- sipspy [41] -- tool for capturing and graphical representation of SIP traffic in multiple nodes
- wist [42] -- remote SIP tracing
- see also Klaus Darilion's list of SIP testing tools [43]
- UA
- kphone [44]
- minisip [45] -- SIP UA
- Twinkle [46]
- wengo [47]