Checksec.sh

Firmware Analysis Tool

A list of public penetration test reports published by several consulting firms and academic security groups.

Automated All-in-One OS Command Injection Exploitation Tool.

Nikto web server scanner

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

A service to share short term messages stored in memory.

A modern, portable, easy to use crypto library.

Ruby FFI binding to the Networking and Cryptography (NaCl) library (a.k.a. libsodium)