Light-weight system monitor for X
Open Source Monitoring System for performance and availability.
Firewall log analyzer
Sysmon prints short and uniform information about OS
tcptrace analyzes packet tcp connections and provides analysis
Simple and Lightweight CMS Framework
Monitorix is a system monitoring tool
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
track log files, block intrusions, and much more
Scalable, distributed monitoring system for high-performance computing
Urban Terror Server Monitoring Program
netflow collecting and processing tools
Simple Multi Protocol Packet Sniffer - SMPPS
NDPMon - Neighbor Discovery Protocol Monitor