Open Source Monitoring System for performance and availability.
Xymon monitors your hosts, your network services, and everything else.
Router distribution based on FreeBSD with FFRouting and Bird
iptables mini-script in file-wizard
Anti Spam SMTP Gateway
TraceMAC is a command-line Layer 2 traceroute for Cisco switches
Web Gateway Appliance
Wide Area Network Emulator
Simulatore di reti con UserMode Linux
Pioneering Private and Public Cloud Management since 2008
A modern graphical SSH client
A powerful network security tool, easy, safe and totally free.
OPTOSS Next Gen Network Management System (NG-NetMS)
Programmable completion code (bash) for ip[6]tables (netfilter.org)
Brute-forcing WAN/LAN services
Energy and environmental monitoring of the server room
High interaction honeypot solution for Linux based systems
MitM pentesting opensource toolkit
[UPDATE 28-10-2015] FINAL MULTIPLINK SSH LIFETIME v2.0 UP-5 "FAREWELL"
SSH Java client GUI for Unix, Linux administration and monitoring