Armory
AD Explorer
Active Directory Explorer (AD Explorer) is an advanced Active Directory (AD) viewer and editor. You can use AD Explorer to easily navigate an AD database, define favorite locations, view object properties and attributes without having to open dialog boxes, edit permissions, view an object's schema, and execute sophisticated searches that ...
Advanced IP Address Calculator 
(1 rating)
Advanced IP Address Calculator is an easy-to-use IP subnet calculator that lets you calculate every aspect of your subnet configuration in a few mouse clicks! The calculator generates a color-coded bit map, breaking down the network, subnet, and host portion. It shows you the subnet host address range, the subnet ...
Advanced IP Scanner
Advanced IP Scanner is a fast, robust and easy-to-use IP scanner for Windows. It easily lets you have various types of information about local network computers in a few seconds! Advanced IP Scanner gives you one-click access to many useful functions - remote shutdown and wake up, Radmin integration and ...
Advanced LAN Scanner
Advanced LAN Scanner is a small, easy-to-use, highly configurable network scanner for Win32. And it's VERY fast. Advanced LAN Scanner uses multithreading so you can scan more than 1000 elements per second! If used to scan ports, Advanced LAN Scanner can scan all 65536 ports in less than a minute! ...
Advanced Port Scanner
Advanced Port Scanner is a small, fast, robust and easy-to-use port scanner for Win32 platform. It uses a multithread technique, so on fast machines you can scan ports very fast. Also, it contains descriptions for common ports, and can perform scans on predefined port ranges.
aircrack (1 rating)
aircrack is an 802.11 WEP and WPA-PSK key cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, thus making the attack much faster compared to other WEP cracking tools. In fact, aircrack is ...
AirSnort
AirSnort is a wireless LAN (WLAN) tool which recovers encryption keys. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered. 802.11b, using the Wired Equivalent Protocol (WEP), is crippled with numerous security flaws. Most damning of these is the weakness described in " ...
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, ...
arpwatch
arpwatch is an open-source software that monitors a computer network for ARP-activity. It generates a log of IP address-MAC address pairings along with a timestamp when the pairing appeared on the network. The first and foremost reason to monitor ARP activity is to detect ARP spoofing. It is developed by ...
AsItHappens Network Statistic Collector
AsItHappens is a real-time network statistic collector and grapher. It collects data from devices over a network and displays them on a graph, optionally storing collected data in a database for later retrieval. Current collection types include network response, bandwidth, processor usage, memory usage, Cisco NBAR, Cisco NetFlow and arbitrary ...
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 ...
BackTrack (5 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 ...
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 ...
Bluebugger
bluebugger is an implementation of the bluebug technique which was discovered by Martin Herfurt.
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 ...
Cacti 
(6 ratings)
Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use ...
Cain & Abel (1 rating)
Cain & Abel is a password recovery tool for Microsoft Operating Systems. It allows easy recovery of various kind of passwords by sniffing the network, cracking encrypted passwords using Dictionary, Brute-Force and Cryptanalysis attacks, recording VoIP conversations, decoding scrambled passwords, recovering wireless network keys, revealing password boxes, uncovering cached passwords ...
cdpr
cdpr is used to decode a Cisco Disovery Protocol (CDP) packet, by default it will report the device ID, the IP Address (of the device), and the port number that the machine is connected to. Optionally it will decode the entire CDP packet.
chntpw
chntpw is an offline NT password and registry editor. It can be used to blank or reset passwords on Windows NT/2000/XP/2003 machines, as well as manipulate the registry. It is provided primarily as a boot CD image, but can also be installed on a permanent Linux system.
Cisco Device Info
Cisco Device Info (CDI) is a Windows application to retrieve runtime information from Cisco equipment such as routers and switches. This is achieved using the SNMP protocol, supporting SNMP versions 1 through 3. CDI has been tested against hundreds of routers in productions environments around the globe. It is free ...
Curl
Powerful tool used by many data centers to check the L7 connectivity.. I saw this missing in your list.
DHCP Explorer
DhcpExplorer tool allows you to discover DHCP servers on your local subnet or LAN. This is useful for locating servers that are not supposed to be on your network ( rogue DHCP servers ) as well as checking the expected output of known servers. DHCP Explorer broadcasts on the local ...
Disk Usage
Du (disk usage) reports the disk space usage for the directory you specify. By default it recurses directories to show the total size of a directory and its subdirectories.
driftnet
Inspired by EtherPEG, Driftnet is a program which listens to network traffic and picks out images from TCP streams it observes. Fun to run on a host which sees lots of web traffic.
dsniff
dsniff is a collection of tools for network auditing and penetration testing. dsniff, filesnarf, mailsnarf, msgsnarf, urlsnarf, and webspy passively monitor a network for interesting data (passwords, e-mail, files, etc.). arpspoof, dnsspoof, and macof facilitate the interception of network traffic normally unavailable to an attacker (e.g, due to layer-2 switching). ...
Dynagen (2 ratings)
Dynagen is a front-end for use with the [Dynamips](/armory/dynamips/) Cisco router emulator. It uses an INI-like configuration file to provision Dynamips emulator networks. It takes care of specifying the right port adapters, generating and matching up those pesky NIO descriptors, specifying bridges, frame-relay, ATM switches, etc. It also provides a ...
dynamips (3 ratings)
Dynamips is able to emulate Cisco hardware by running an unmodified IOS image on commodity PC hardware. Cisco 2600, 3600, 3700, and 7200 series routers are supported, as well some generic virtual devices like frame relay and Ethernet switches. Dynamips is developed by Christophe Fillot. A front end like [Dynagen](/armory/dynagen/) ...
EIGRP-tools
EIGRP-tools is a custom EIGRP packet generator and sniffer combined. It was developed to test the security and overall operation quality of the EIGRP routing protocol. Using this tool requires you to have the requisite background knowledge of EIGRP, packets structure/types, alongside a good working background of the Layer 3 ...
epb - Ethernet Packet Bombardier
Epb is a SIMPLE tool, allowing one to send customized ethernet packages. Package is specified in text file. No GUI offered, but also not many libraries needed. Furthermore understanding and customizing code is easy. Epb is intended to be used to test network implementations/rule configurations. Crafting test packages is easy ...