Blackbuntu is distribution for penetration testing which was specifically designed for security training students and practitioners of information security. Blackbuntu is yet another Ubuntu base distro for Penetration Testing with GNOME Desktop Environment.
Hexcat (hexcat) is a UNIX/Linux hex editor that outputs the source in hexadecimal/plaintext/bin in three seperate columns. This output can be streamed like the other UNIX commands, such as 'cat'. (The link is for Debian-based systems)