OpenSnitch is a GNU/Linux port of the Little Snitch firewall
Take back control of your email with this mail server in a box
Daemon to ban hosts that cause multiple authentication errors
CacheGuard Gateway is a UTM, a WAF, and a QoS management appliance.
Anti Spam SMTP Gateway
Tool to ping hosts through firewalls blocking ICMP
A web interface for various penetration testing tools
The Koozali SME Server is a simple and robust server gateway for SOHO