Firewall/Proxy FreeBSD
ss7mon an SS7/SIGTRAN signalling monitor
Send steganographed text messages to mtr with fake hops in the network
Tool for identifying Network Service Dependencies
distributed nmap framwork
Managing OpenBSD's Packet Filter with Python
Monitoring your infrastructure for free.
A simple TCP/UDP Port Flooder written in Python.
Remote server monitoring application
DNS Validating Stub Resolver
SpiderOak Nagios check
Open Source System and Network Monitoring for Linux Desktop
Organizing the Knowledge of Humanity