Firewall log analyzer
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Next Generation Open Source Firewall
repair corrupted pcap and pcapng files
Snare Enterprise: bit.ly/Snare-Trial
Xplico is a Network Forensic Analysis Tool (NFAT)
PCAP from another point of view
Open Source SIEM
Bandwidth monitor and rate estimator
Monitor Apache using SNMP
Passive Proxy Daemon sniffs packets and creates squid proxy logs
Logs IP to IP contact, number of packets, bytes.