Linux Firewall Builder - XML to iptables Converter
A Perl program that takes firewall rules written in XML and generates an iptables based shell script for Linux based firewalls - can be used on dedicated firewalls or on general servers and clients.
Multicast System Control Daemon
A daemon that currently runs of Solaris, Linux and Windows machines that allows RSA signed multicast messages to be sent. Presently it allows groups or specific networks of machines to be quickly shutdown or rebooted by system administrators from a trusted source.