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Extended version of the free virus scanner Avira Free Antivirus. Protects against viruses, rootkits, spyware, phishing and malicious web sites. Also detects unknown viruses by behaviour. Prevents downloading of viruses while browsing the internet and monitors mail traffic.

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Allows the encryption and signing of files and emails. Features a versatile key management system and access modules for public key directories. GPG is a command line tool which can be easily integrated with other applications. Implements the OpenPGP standard as defined by RFC2440. Fast and secure download from The H

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Intercepts network connections. SSH and HTTPS connections can also be redirected. Fast and secure download from The H

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Protects against online attacks such as viruses, spyware, trojans and root kits, even if the attackers aren’t yet known. No longer offered as a standalone product, only as part of PC Tools Internet Security.

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Simple tool for irretrievably deleting entire hard disks and data. According to the developer it works independent of the partition layout, file and operating system and deals with otherwise inaccessible proprietary formats. Also available as advanced versions (basic, standard and professional).

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Windows driver and packet capture library for logging network packets. Required by Wireshark and Nmap.

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Irretrievably deletes files and folders of any kind from any location on the hard drive by overwriting the data. Uses Guttman, pseudorandom data and US-DoD-5220-22.M methods to do this. Fast and secure download from The H

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Simplifies the configuration of firewall scripts for iptables and ipchains. The graphical interface is based on modern firewall GUIs and allows easily creating firewall rules to be implemented in a script. Download of the versions for Windows and Mac OS X requires a valid email address. Fast and secure download from The H

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Network intrusion prevention system. Detects intruders on the computer.

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Reads and analyses packages on encrypted WiFi networks and tries to crack the WEP key of packages with weak initialisation vectors. The program has had no development since 2004. Fast and secure download from The H

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This development of the discontinued Ethereal project logs and analyses data traffic on the network. Includes the required WinPCap. Portable version also available. Fast and secure download from The H

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Anti-rootkit tool that searches for hidden files, registry entries, processes and drivers. Discovered files and registry keys may be deleted afterwards.

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Expansion pack for Firefox, Google Chrome, Internet Explorer, Safari and Opera which allows safe surfing by providing information about the trustworthiness of a web site about to be accessed.

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Steganography program that allows you to hide files in graphic images. Provides encryption and hashing functions.

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Linux live system for penetration tests to find weak points in the system.

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Opens the Windows firewall and allows the control of applications making outbound connections to the internet.

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Classic tool for establishing a private VPN connection. Encrypts data and allows the user to surf the web anonymously (without sending out their IP address). Offers secure surfing at public hotspots and bypasses firewalls. Also available as an enhanced premium version which is faster and has support for OpenVPN, PPTP and L2TP/IPSec, as well as various servers in the US.

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Live Linux distribution focusing on security, privacy and anonymity. Leaves no traces on the computer and uses the Tor network online.

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Monitors network traffic and attempts to detect suspicious activities, packets and connections that could lead to an attack on the network. Information is obtained from various sources such as Snort.

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Linux-based Enterprise-Firewall/Unified Threat Management solution for protecting your network against harmful attacks from the internet; it uses Stateful Inspection, URL and email filtering to provide protection from attacks, such as hacks, trojans and email and web-viruses. It manages various VPN and SSL connections and enable policy routing. Download requires registration.

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