Monitor and Manage Wi-Fi
Eye candy ARP spoofer for Windows
Zenoss - Intelligent IT Operations Management
Network Ping time and UPS Logger
Xplico is a Network Forensic Analysis Tool (NFAT)
Show devices in a lan
track log files, block intrusions, and much more
Scalable, distributed monitoring system for high-performance computing
MitM pentesting opensource toolkit
Network performance monitoring and logging script for Cisco devices.
OSPF network discovery script via SNMP.
Batch system monitoring and archiving
nagios-statd patch for use with python >= 2.6