Lynis is an auditing and hardening tool for Unix derivatives like Linux/BSD/Solaris. It scans systems to detect software and security issues. Besides security-related information, it will also scan for general system information, installed packages, and possible configuration mistakes. The software is aimed at assisting automated auditing, software patch management, and vulnerability and malware scanning of Unix-based systems.
MASTIFF is a static analysis framework which automates the process of extracting key characteristics from a number of different file formats. To ensure the framework remains flexible and extensible, a community-driven set of plugins is used to perform file analysis and data extraction. While originally designed to support malware, intrusion, and forensic analysis, the framework is well-suited to support a broader range of analytic needs. In a nutshell, MASTIFF allows analysts to focus on analysis rather than figuring out how to parse files.
Xplico is an IP traffic decoder that extracts data from an Internet traffic capture. From a pcap file, it can extracts each email (POP, IMAP, and SMTP protocols), all HTTP content, VoIP calls (SIP, RTP, H323, MEGACO, MGCP), IRC, MSN, and so on. It isn't a packet sniffer or a network protocol analyzer, but rather an IP/Internet traffic decoder or network forensic analysis tool (NFAT).
Gpart is a small tool which tries to guess which partitions are on a PC harddisk in case the primary partition table was damaged. It works by scanning through the device (or file) given on the commandline on a sector basis. Each guessing module is asked if it thinks a filesystem it knows about could start at a given sector. Several filesystem guessing modules are built in, and others can be added dynamically.
Fortools_dd is a set of forensic apps, created with zenity, for terminal commandos and bash scripts in Linux. It includes Mount_dd (a mounting images app), kijknekerap (a Dutch Terminal app), fgrep_dd (grep apps), convert_dd (a conversion app for aff > dd > EWF), shred_dd (a shredding app), filecopy_dd (a search-and-copy app), forensic_wine_dd (a Windows software with Wine app), reportmaker_dd (a small reportmaking app), Browserhistory_dd (a history app), and Offsetgrabber_dd (an offset viewing app).
DFF (Digital Forensics Framework) is a simple but powerful tool with a flexible module system which will help you in your digital forensics works, including file recovery due to error or crash, evidence research and analysis, etc. DFF provides a robust architecture and some handy modules.
WTMParse is a script originally intended for use in forensic examinations which parses WTMP files from Unix-like operating systems and generates a CSS-styled HTML report containing the login terminal, username, log start date, and login time/date in a table. It's good for postmortem forensic examinations or as a way of getting "last"-like information when you don't have the ability to boot the machine in question but can grab the wtmp.