TraceMAC is a command-line Layer 2 traceroute for Cisco switches
A benchmark suite for reliable testing of IP networks.
The Free & Popular opendhcp application for Physical & Virtual Machine
An iptables IPv4 firewall and traffic shaping program
blocklists for openbsd,freebsd,linux,iptables,bsd pf,pf,ipfilter
Programmable completion code (bash) for ip[6]tables (netfilter.org)
OPTOSS Next Gen Network Management System (NG-NetMS)
A simple, handy network addressing multitool with plenty of features.
Brute-forcing WAN/LAN services
Programmable completion code (bash) for ipset (netfilter.org)