Here is a compilassstion of multiple forensic and penetration testing tools for applications, networks, and websites.
Nmap
Nmap is a very versatile tool developed to scan addresses (IPV6
included), this tool allows the users to gather a mass amount of
information about the target quickly, information including open ports, +
much, much more.
Nmap supports a large number of scanning techniques such as: UDP, TCP
connect(), TCP SYN (half open), ftp proxy (bounce attack), ICMP
(ping sweep), FIN, ACK sweep, Xmas Tree, SYN sweep, IP Protocol, and
Null scan.
A very powerful network troubleshooting and analysis tool,
Wire shark provides the ability to view data from a live network, and supports hundreds of protocols and media formats.
Cain & Abel
Cain and Abel is a revolutionary tool that provides many functions that
are able to do various password retrieval jobs, cracking passwords,
sniffing networks, and routing/analyzing protocols. This tool is
Windows-only, unlike many other tools that exist, this is a pleasant
twist to modern penetration testing and forensic tools.
MetaSploit, a very powerful network security and analysis tool, used
often for penetration attacks, this tool has a clean interface and
easily gathers the information that you seek.
Ettercap is a suite for man in the middle attacks on LAN. It features
sniffing of live connections, content filtering on the fly and many
other interesting tricks. It supports active and passive dissection of
many protocols (even ciphered ones) and includes many feature for
network and host analysis. (Taken from their website)
The Nessus tool provides high-speed data discovery, asset profiling,
configuration auditing, and vulnerability analysis of networks.
Havij is the most common and heard of testing tool for SQLI injection
and many other web-based injection types. It fluently provides the
site's scan, admin look-up, password cracking, and database retrieval.
It literally makes it a breeze to hack, and find, vulnerable websites.
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 (with appropriate
hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic.
Kismet also supports plugins which allow sniffing other media such as
DECT. (Taken from Kismet website)
Back Track is a widely popular bootable Live-CD of a Linux Distro. Back
Track offers a vast variety of penetration testing tools, along with
those for network attacks, and supports many other forms of
testing/attacking, for VOIP networks, Websites + more. The tool's
interface and design provides an easy to use layout.
W3af is an extremely popular, powerful, and flexible framework for
finding and exploiting web application vulnerabilities. It is easy to
use and extend and features dozens of web assessment and
exploitation-plugins. In some ways it is like a web-focused Metasploit. (Taken from nmap.org)
EnCase is
a suite of computer forensics software, commonly used by law
enforcement. Its wide use has made it a de-facto standard in forensics.
It is made to collect data from a computer in a forensically sound
manner (employing checksums to help detect tampering). (Taken from Nmap.org.)
Helix is a live bootable Ubuntu CD, that contains a multitude of
forensic tools involving cellphones, computers, file systems, images,
and tied into its sheer power is a friendly and easy-to-use interface.
Acunetix is a strong, and very popular website security tool. It
provides many tools to test your website, (or others) for various
injections. Acunetix WVS automatically checks your web applications for
SQL Injection, XSS & other web vulnerabilities.
Burp Suite is an integrated platform for performing security testing of
web applications. Its various tools work seamlessly together to support
the entire testing process, from initial mapping and analysis of an
application's attack surface, through to finding and exploiting security
vulnerabilities. (Taken from http://portswigger.net/burp/)