SinFP is a new approach to OS fingerprinting, which bypasses limitations that nmap has. More info: http://www.gomor.org/sinfp . SinFP has now 140 signatures. You can download it via CPAN, or via SourceForge: https://sourceforge.net/projects/sinfp Also, two benchmarks versus Nmap have been done: http://www.phocean.net/index.php/post/2006/12/17/SinFP http://www.computerdefense.org/?p=173 This new release has been tested under Solaris 8/SPARC, and Mac OS [...]

Philipp Haupt and Matthias Hürlimann have developed an excellent open source VOIP security test tool called SIP Proxy. This tool can be used both as a proxy and as a VOIP fuzzing source. Great tool ! SIP Proxy homepage on Sourceforge.

Telemachus is a companion utility for the well-known web proxy Odysseus, allowing further analysis and manipulation of the HTTP transactions that have passed through Odysseus. Telemachus can communicate with the currently active instance of Odysseus,or alternately load a previously saved Odysseus activity log file. Although primarily designed to be used in conjunction with Odysseus,Telemachus can [...]