Armory
Ostinato 
(1 rating)
Ostinato is an open-source network packet and traffic generator and analyzer with a friendly GUI. It aims to be "Wireshark in Reverse" and become complementary to Wireshark. It features custom packet crafting with editing of any field for several protocols: Ethernet, 802.3, LLC SNAP, VLAN (with Q-in-Q), ARP, IPv4, IPv6, ...
BackTrack (3 ratings)
BackTrack is the most Top rated linux live distribution focused on penetration testing. With no installation whatsoever, the analysis platform is started directly from the CD-Rom and is fully accessible within minutes. It's evolved from the merge of the two wide spread distributions - Whax and Auditor Security Collection. By ...
ShowIP (1 rating)
Firefox plugin by Jan Dittmer. Shows the IP address of the current page in the status bar. It also allows querying custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft. Additionally you can copy the IP address to the clipboard. This extension was formerly ...
Firebug (1 rating)
Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.
Tamper Data (1 rating)
Firefox plugin by Adam Judson. Use Tamper Data to view and modify HTTP/HTTPS headers and post parameters, trace and time http response/requests, and security test web applications by modifying POST parameters.
inSSIDer (5 ratings)
inSSIDer is an award-winning free Wi-Fi network scanner for Windows Vista and Windows XP. Because NetStumbler doesn't work well with Vista and 64-bit XP, we built an open-source Wi-Fi network scanner designed for the current generation of Windows operating systems. A year later, inSSIDer was discussed by Lifehacker and Tekzilla!
wget (1 rating)
GNU Wget is a free software package for retrieving files using HTTP, HTTPS and FTP, the most widely-used Internet protocols. It is a non-interactive commandline tool, so it may easily be called from scripts, cron jobs, terminals without X-Windows support, etc. GNU Wget has many features to make retrieving large ...
KeePass (3 ratings)
KeePass is a free open source password manager, which helps you to manage your passwords in a secure way.
Nessus (2 ratings)
The Nessus vulnerability scanner, is the world-leader in active scanners, featuring high speed discovery, configuration auditing, asset profiling, sensitive data discovery and vulnerability analysis of your security posture. Nessus scanners can be distributed throughout an entire enterprise, inside DMZs, and across physically separate networks. When Nessus is managed with Tenable's ...
Vistumbler (1 rating)
A wireless network scanner for Windows Vista and Windows 7, which wraps Window's netsh utility to obtain wireless information. Also includes GPS support.
TrueCrypt 
(4 ratings)
TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted volume (data storage device). On-the-fly encryption means that data are automatically encrypted or decrypted right before they are loaded or saved, without any user intervention. No data stored on an encrypted volume can be read (decrypted) without using the ...
VMware Workstation (4 ratings)
VMware Workstation is a virtual machine software suite for x86 and x86-64 computers from VMware, previously a division of EMC Corporation. This software suite allows users to set up multiple x86 and x86-64 virtual computers and to use one or more of these virtual machines simultaneously with the hosting operating ...
Wireshark 
(14 ratings)
Wireshark is the world's foremost network protocol analyzer, and is the de facto (and often de jure) standard across many industries and educational institutions.
PuTTY (11 ratings)
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham.
nmap (3 ratings)
Nmap ("Network Mapper") is a free and open source utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to ...
GNS3 (3 ratings)
GNS3 is a graphical network simulator that allows you to design complex network topologies and to launch simulations on them. To allow complete simulations, GNS3 is strongly linked with [Dynamips](/armory/dynamips/), an IOS emulator which allows users to run IOS binary images from Cisco Systems, and [Dynagen](/armory/dynagen/), a text-based front-end for ...
Kismet (1 rating)
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, and 802.11g traffic. Kismet identifies networks by passively collecting packets and detecting standard named networks, detecting (and given time, ...
Kiwi CatTools (2 ratings)
Kiwi CatTools automates configuration backups and management on routers, switches and firewalls. It provides e-mail notification and compare reports highlighting config changes. Supports Telnet, SSH, TFTP and SNMP.
OpenVAS (2 ratings)
OpenVAS stands for Open Vulnerability Assessment System and is a network security scanner with associated tools like a graphical user fontend. The core is a server component with a set of network vulnerability tests (NVTs) to detect security problems in remote systems and applications. OpenVAS products are Free Software under ...
Angry IP Scanner (1 rating)
Angry IP Scanner is an open-source and cross-platform network scanner designed to be fast and simple to use. It scans IP addresses and ports as well as has many other features. It is widely used by network administrators and just curious users around the world, including large and small enterprises, ...
KNOPPIX (2 ratings)
KNOPPIX is a bootable Live system on CD or DVD, consisting of a representative collection of GNU/Linux software, automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals. KNOPPIX can be used as a productive Linux system for the desktop, educational CD, ...
NetStumbler (3 ratings)
NetStumbler is a tool for Windows that allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g. It can be used for locating access points, mapping wireless coverage, calibrating antennas, and much more. Its counterpart, MiniStumbler, is available for mobile platforms.
EtherApe (1 rating)
EtherApe is a graphical network monitor for Unix modeled after etherman. Featuring link layer, IP and TCP modes, it displays network activity graphically. Hosts and links change in size with traffic. Color coded protocols display. It supports Ethernet, FDDI, Token Ring, ISDN, PPP and SLIP devices. It can filter traffic ...
Netsparker
Netsparker® can find and report security issues such as SQL Injection and Cross-site Scripting (XSS) in all web applications regardless of the platform and the technology they are built on. Netsparker's unique detection and exploitation techniques allows it to be dead accurate in reporting hence it's the first and the ...
AutoRuns
This utility, which has the most comprehensive knowledge of auto-starting locations of any startup monitor, shows you what programs are configured to run during system bootup or login, and shows you the entries in the order Windows processes them. These programs include ones in your startup folder, Run, RunOnce, and ...
BGPlay
BGPlay is a Java application which displays animated graphs of the routing activity of a certain prefix within a specified time interval. Its graphical nature makes it much easier to understand how BGP updates affect the routing of a specific prefix than by analyzing the updates themselves. The BGPlay database ...
Retina
Retina Network Security Scanner, identifies known and zero day vulnerabilities plus provides security risk assessment, enabling security best practices, policy enforcement, and regulatory audits.
Terminals
Terminals is a secure, multi tab terminal services/remote desktop client. It uses Terminal Services ActiveX Client (mstscax.dll). The project started from the need of controlling multiple connections simultaneously. It is a complete replacement for the mstsc.exe (Terminal Services/Remote Desktop Services) client. Right now it supports all of these connection types: ...
Burp Suite
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 and speed up the process of attacking an application. All tools share the same robust framework for handling HTTP requests, authentication, downstream proxies, logging, alerting ...
Samurai Web Testing Framework
The Samurai Web Testing Framework is a live linux environment that has been pre-configured to function as a web pen-testing environment. The CD contains the best of the open source and free tools that focus on testing and attacking websites. In developing this environment, we have based our tool selection ...