Intelligently block brute-force attacks by aggregating system logs
ICMP-based network bandwidth measurement tool
Firewall log analyzer
High capacity syslog data collection, filtering, and management.
A simple, portable port scanner
Cisco switch port mapper
Apache module for SNMP monitoring
Monitor Apache using SNMP
Rule Engine for State and Event Monitoring
Cluster Monitoring tool using gossip mechanisem
Daemonlogger is a packet logger and soft tap developed by Martin Roes
Simple Multi Protocol Packet Sniffer - SMPPS
NDPMon - Neighbor Discovery Protocol Monitor
LCDSpicer2 is on their way