TraceMAC is a command-line Layer 2 traceroute for Cisco switches
The Free & Popular opendhcp application for Physical & Virtual Machine
a set of bash scripts that make life easier for Ubuntu users/admins
shell program to automatically configure freebsd as a firewall
Standalone web application allowing to monitor end points availability
Open source voucher management / hotspot system
Brute-forcing WAN/LAN services
simple rdist rcs and tools , srtools , synchronizing
network control and reporting
Dialog GUI for NetworkManager
Monitoring your infrastructure for free.
WAN simulator for high-latency networks