pam_mount is a Pluggable Authentication Module that can mount volumes for a user session (login). Supports mounting local filesystems of any kind the normal mount utility supports, with extra code to better support CIFS, FUSE, various crypto, and more.
tgcd is a simple Unix network utility to extend the accessibility of TCP/IP based network services beyond firewalls. This can also be used by network analysts and security experts for penetration testing and analyze the security of their network.
It's written in C Language.
Pace-ICMP is a utility that can allow X amount of ICMP (ping, etc) packets travel to the host, once X is exceeded, all ICMP traffic is blocked. This allows ping and traceroute functionality, while still protecting you against ICMP attacks.