GnuPG - Free Software Foundation, Inc.
GnuPG is a complete and free replacement for PGP. Because it does not use the patented IDEA algorithm, it can be used without any restrictions. ...

SafeSquid Composite Edition
SafeSquid is an antivirus and content filtering proxy server. The project has many advanced features such as URL blacklists, bandwidth management, regular expression substitution on ...

Burp Suite - PortSwigger
Burp Suite is an integrated platform for attacking web applications. It contains all of the Burp tools with numerous interfaces between them designed to facilitate ...

Scrambled-Egg - Cristi Constantin
With Scrambled-Egg you can easily encrypt your messages using AES, Blowfish, CAST, or DES3, then encode the result in a printable form, using Base64, HEX, ...

Mantra Security Toolkit
Mantra is a dream that came true. It is a collection of free and open source tools integrated into a web browser, which can become ...

Firewall Builder - NetCitadel, LLC.
Firewall Builder is a multi-platform firewall configuration and management system. It consists of a GUI and set of policy compilers for various firewall platforms.

dradis - ETd
dradis is an free software for sharing information during Security Testing.

Snort - Sourcefire, Inc.
Snort project is an open source intrusion detection software that can be configured in four modes:

chkrootkit - Nelson Murilo
chkrootkit project is a tool to locally check for signs of a rootkit.

Keep It Secret! Keep It Safe!
Keep It Secret! Keep It Safe! (KisKis) is an easy-to-use password manager written in JAVA. So it runs on any platform with an appropriate Java-Virtual-Machine ...

jPDFSecureCLI - Qoppa Software
jPDFSecureCLI is a Java utility that can change security settings on PDF Documents. With jPDFSecureCLI, you can encrypt and decrypt PDF documents as well as ...

NiX Brute Forcer
NiX Brute Forcer tool is intended to demonstrate the importance of choosing strong passwords.

WebCert
WebCert is an open source web application designed to generate and manage digital certificates in cases where no "full" CA (Certificate Authority) is needed.

Silverlock
Silverlock is a free and easy to use, simple, secure password management application designed to ease the management of account credentials and related information.

Sydbox
Sydbox is a ptrace based sandbox implementation which is based in part upon catbox and strace.

Plover
Plover is a free and open source software intended to bring real-time stenographic technology not just to stenographers, but also to hackers, hobbyists, accessibility mavens, ...

Tahoe-LAFS
Tahoe-LAFS (Least Authority File System) is a Free Software/Open Source decentralized data store.

netifera
A new modular open source platform for creating network security tools. This project provides many advantages for both security developers and researchers who want to ...

HMAC
HMAC is a standalone packaging of the hashlib compatible hmac library included with Python 2.5 so that it can be used together with the hashlib backport ...

Secure Group Portal
Secure Dept Portal is an extension to the 'Secure Portal' project which offers multi-department handling so that users can be assigned to different departments. 

Secure Gateway
Secure Gateway started life as a simple light weight secure login gateway, but it has changed over time.

Personal Gateway
that have been requested for and are being added into Secure Gateway.

Note Safe
Note Safe is a very secure storage tool, allowing you to store notes/data/passwords etc in a strong secure way.

AppArmor
AppArmor is a software that gives you network application security via mandatory access control for programs, protecting against the exploitation of software flaws and compromised ...