SQL operating system instrumentation and monitoring framework
Skills for threat modeling, scanning, triage, patching, etc.
Bug-fix-only libev port of shadowsocks
Easy to use cryptographic framework for data protection
A library for secure deleting data on-the-fly
A library for hiding the local IP address from applications.
A library for blocking access to network on-the-fly
C++ cryptographic library (modern hash functions, ciphers, KDFs)
Java SSH API
An advanced cross platform fuzzing framework suited to find code bugs.
Another C++ Hack
Hexadecimal and raw packet injector and sniffer.
msfvenom shellcode generator/compiler/listenner
Crypt encryption and decryption is based on ASCII Table Shift.
ISC lets you encrypt & decrypt text and files of any type up to 4GB
Open Source Penetration Testing / Ethical Hacking Framework
Online Multi-Engine Antivirus Scanner
Free and Open Source Browser based Security Framework
Set limits on per-day total usage for Linux/Unix users