Open Source Routing Machine - C++ backend
Full-featured enterprise network management tool
An Open Source POWERLINK network configuration toolkit
An eclipse plugin for the openCONFIGURATOR configuration tool
Visual Network Management System
GT2 combines online and offline navigation for hikers and cyclists
Recursive mapping/discovery of network devices via CDP/OSPF
Stormons is a powerful SAN mapping and monitoring program
SNMP adaptor for JMX.