oletools - python tools to analyze MS OLE2 files (Structured Storage, Compound File Binary Format) and MS Office documents, for malware analysis, forensics and debugging.

peinjector - MITM PE file infector

pefile is a Python module to read and work with PE (Portable Executable) files

LZMAT (http://www.matcode.com/lzmat.htm) git repository

an open source ransomware honeypot

minimal symbolic model checker & fuzzer

Volatility plugins

This Powershell script will generate a malicious Microsoft Office document with a specified payload and persistence method.

Various Crypter Project

cribdrag - an interactive crib dragging tool for cryptanalysis on ciphertext generated with reused or predictable stream cipher keys

It's dangerous to go alone... take this.

RC2 cipher in pure python

Old fashion text rpg with mad lib like storylines obtained from wiki articles