Anti-Spam SMTP Proxy Server implements multiple spam filters
Open Source Monitoring System for performance and availability.
SNMP poller for Xymon
Lightweight Event Management System (for Monitoring-Events and more)
Various TCP/IP servers, clients and network management tools
Recursive mapping/discovery of network devices via CDP/OSPF
MAG Server stands for Monitor And Graphing Server. [VM Appliance]
External script for Xymon server to query an ESXi