lastAudit!

Flexera Software Personal Software Inspector, previously Secunia PSI, is a FREE security tool designed to detect vulnerable and out-dated programs and plug-ins which expose your PC to attacks. Attacks exploiting vulnerable programs and plug-ins are rarely blocked by traditional anti-virus and are therefore increasingly "popular" among criminals.

The Autopsy Forensic Browser is a graphical interface to the digital investigation tools in The Sleuth Kit. Together, they allow you to investigate the file system and volumes of a computer.

Lynis is an open source security auditing tool. Primary goal is to help users with auditing and hardening of Unix and Linux based systems. The software is very flexible and runs on almost every Unix based system (including Mac). Even the installation of the software itself is optional!

FTK is a court-cited digital investigations platform built for speed, stability and ease of use. It provides comprehensive processing and indexing up front, so filtering and searching is faster than with any other product. This means you can “zero-in” on the relevant evidence quickly, dramatically increasing your analysis speed. Furthermore, because of its architecture, FTK can be setup for distributed processing and incorporate web-based case management and collaborative analysis.Visualize Big Data, Find the Relevant Evidence Faster »

SecPod Saner is a light-weight, easy to use, enterprise-grade security solution for proactively assessing and securing your personal computer. It identifies security loopholes and misconfigurations, and remediates to ensure systems are secure.

Open-AudIT is a network auditing application. It is based on the scripting languages of PHP, Bash and VBScript. It can tell you what is on your network, how it is configured and when it changes.