FlowViewer is a web-based netflow data analysis tool.
Live DVD with CORE network simulator
Gerix WiFi cracker
simplePXE brings a PXE server to everyone
Network performance monitoring and logging script for Cisco devices.
OSPF network discovery script via SNMP.
network control and reporting
BGPHist stores MP-BGP updates activity and history into a database.
Recursive mapping/discovery of network devices via CDP/OSPF
Open Source BGP Looking-glass
Send steganographed text messages to mtr with fake hops in the network
A SNMP agent for management of MPLS for Linux .