HTTP proxy to block ads and customize webpages
Network Load Balancer and Application Security
Next Generation Open Source Firewall
Anti Spam SMTP Gateway
Zentyal is a Linux Small Business Server
Tiny Alien - Micro Serving on a Shoestring
Linux firewall distribution geared towards home and SOHO users.
IOSec Addons are enhancements for web security and crawler detection
Disconnect your children from the Internet after bedtime.
Firewall/Proxy FreeBSD
Easy to use firewall for linux beginners.
Lomalarga is a VPN-like service based on SSH and Linux.