Snort - Snort is an open-source, free and lightweight network intrusion detection system (NIDS) for UNIX derivatives and Windows. KeePass - A free password safe. Passwords can be stored in highly-encrypted databases, that can be unlocked with one master key or key-disk. For 32- and 64-bit Windows. Links to a port for Linux and MacOS X, and a converter for PalmOS. NetworkTools - A Java based toolkit made up of a protocol analyzer and a port scanner to monitor and troubleshoot security and network problems. Libssh project - Libssh is a free C library implementing the SSH protocol in conjunction with libcrypto from OpenSSL. Nmap - Nmap (Network Mapper) is a security scanner. It is used to discover hosts and services on a computer network. Kali Linux - Kali Linux is a Debian-derived Linux distribution specifically designed for digital forensics and penetration testing. dradis - Open-source software for sharing information during penetration testing. Prey - Tracking software that helps users find, lock and recover their computer, tablet or smartphone when stolen or missing. The Bro Network Security Monitor - Bro is an open source, UNIX based network monitoring framework. It can be used for network intrusion detection, collecting network measurements, conducting forensic investigations and traffic baselining.