The Ray Tracing in One Weekend series of books
Manual for mobile app security testing and reverse engineering
Get and save hashes of files in a drive or folder.
msfvenom shellcode generator/compiler/listenner
Linux, Windows and Apple Mac File Hashing GUI Tool
SRP6 Authentication Library for C# and Java
Linux security assessment tool.
A web interface for various penetration testing tools
An open source malware analysis tool
A management system for sensitive system and security information