dnsmap was originally released back in 2006 and was inspired by the fictional story "The Thief No One Saw" by Paul Craig, which can be found in the book "Stealing the Network - How to 0wn the Box".
dnstracer
dnstracer determines where a given Domain Name Server (DNS) gets its information from for a given hostname, and follows the chain of DNS servers back to the authoritative answer.
dnswalk
dnswalk is a DNS debugger. It performs zone transfers of specified domains, and checks the database in numerous ways for internal consistency, as well as accuracy.
DotDotPwn
It's a very flexible intelligent fuzzer to discover traversal directory vulnerabilities in software such as HTTP/FTP/TFTP servers, Web platforms such as CMSs, ERPs, Blogs, etc.
enum4linux
A Linux alternative to enum.exe for enumerating data from Windows and Samba hosts.
enumIAX
enumIAX is an Inter Asterisk Exchange protocol username brute-force enumerator. enumIAX may operate in two distinct modes; Sequential Username Guessing or Dictionary Attack.
Fierce
First what Fierce is not. Fierce is not an IP scanner, it is not a DDoS tool, it is not designed to scan the whole Internet or perform any un-targeted attacks. It is meant specifically to locate likely targets both inside and outside a corporate network.
Firewalk
Firewalk is an active reconnaissance network security tool that attempts to determine what layer 4 protocols a given IP forwarding device will pass. Firewalk works by sending out TCP or UDP packets with a TTL one greater than the targeted gateway.
fragrouter
Fragrouter is a network intrusion detection evasion toolkit. It implements most of the attacks described in the Secure Networks "Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection" paper of January 1998.