High performance ping tool
ZMap is a fast single packet network scanner for network surveys
The FRRouting Protocol Suite
Intelligently block brute-force attacks by aggregating system logs
ICMP-based network bandwidth measurement tool
Nagios Open Source network monitoring software - The Standard In ITM
Xymon monitors your hosts, your network services, and everything else.
Connector for misconfigured hosts on LAN.
allows connecting to hosts behind firewalls and NAT
A simple, portable port scanner
PeerGuardian - a privacy oriented firewall application
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
VPCS
LLMNR responder daemon for IPv6 networks