JENNOM - Java Enterprise Network Nodes Monitor
Database monitoring agent for zabbix
Highly configurable SNMPv1/v2c/v3 application-level proxy
A simple cacti viewer for smartphones
A XMPP robot for Nagios(tm) notifications and interaction.
Free Accountability Software
Recursive mapping/discovery of network devices via CDP/OSPF
Modifications to Torrus
Bandwidth Monitoring Tool; Console SNMP traffic monitor
Some Plugins for Nagios and Icinga
Passive Proxy Daemon sniffs packets and creates squid proxy logs