Next Generation Open Source Firewall
Anti Spam SMTP Gateway
blocklists for openbsd,freebsd,linux,iptables,bsd pf,pf,ipfilter
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
IOSec Addons are enhancements for web security and crawler detection
Easy to use firewall for linux beginners.
Lomalarga is a VPN-like service based on SSH and Linux.