A network security analysis and monitoring toolkit Linux distribution.
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Front-end performance monitoring and user analytics platform
The professional way to manage your WiFi network using FreeRADIUS
Xplico is a Network Forensic Analysis Tool (NFAT)
PCAP from another point of view
web front-end for vnstat
Logs IP to IP contact, number of packets, bytes.