Jetico BCTextEncoder - Jetico BCTextEncoder is software that ensures your text-based communications are safe by allowing you to encrypt them.
Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
GNUPGK - A GnuPG Frontend GUI made in C#.
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.