An open source OpenPGP compatible encryption system. Provides data integrity services for messages and data files by using digital signatures, encryption, and compression.

Free effective anti-virus security solution for systems running Linux; free updates of all signature files and high scanning speed.

Free software package for booting x86 PCs over networks.

A network scanner that uses spoofed source address packets. Mainly used to test firewall rules and to perform advanced TCP/IP related attacks like the idle scan.

Vexira Antivirus for Linux workstations and servers. A complete virus defense system designed for easy and dependable virus prevention on Linux systems.

An authentication and accounting server for terminal servers that speak the RADIUS protocol.

An advanced TCP/IP packet filter suitable for use in firewall environments. Can be loaded as a module or compiled into the kernel.

Freeware PGP, Pretty Good Privacy interoperable encryption software package. CTC is Rot13 for PGP.

Freeware for Unix/Linux/FreeBSD/OS2/BeOS/Windows 95/98/ME/NT4. Web proxy that filters banner ads, cookies, and referer tracking. Supports wafers and User-Agent spoofing.

Free Tabular DataStream package. Tabular DataStream is a client-to-database server protocol in SyBase and Microsoft SQL database implementations.