Xplico extracts vital information from a pcap file for forensic analysis, Xplico can extract email (POP, IMAP, and SMTP protocols), all HTTP contents, each VoIP call (SIP), and so on. Xplico is an enhanced open source Network Forensic Analysis Tool (NFAT).
Some of the Xplico features include…
• Protocols supported: HTTP, SIP, IMAP, POP, SMTP, TCP, UDP, [...]

Open Source Vulnerability Database (OSVDB) project which manages a global collection of computer security vulnerabilities released support for mysql database few months back, OSVDB previous MYSQL database import utility was based on Perl script which really was a exhausting process for auto integrating OSVDB database with my vulnerability notification application ALERTO, a vulnerability notification system [...]

Grendel Scan an open source automated web application security auditing tool gave a presentation at DEFCON.
Grendel-Scan has an built in automated testing modules for detecting common web application vulnerabilities, and features geared at aiding manual penetration tests. Grendel-Scan system requirement is Java 5; Windows, Linux and Macintosh builds are available.
Grendel-Scan is compatible with 32 Bit [...]