decompyle3
Python decompiler for 3.7+. Stripped down from uncompyle6.

https://github.com/rocky/python-decompile3

What to Look for When Reverse Engineering Android Apps

https://www.nowsecure.com/blog/2020/02/26/what-to-look-for-when-reverse-engineering-android-apps/

a web application that allows you to upload malware samples and if they match specific malware families it will extract the configuration section (config file) for you.

https://malwareconfig.com/

malware sample dynamically generates the name of a mutex object by using Windows product ID, lessening its predictability and complicating detection.

https://threatpost.com/new-technique-complicates-mutex-malware-analysis/111517/

ConfuserEx 2 is a open-source protector for .NET applications. It is the successor of Confuser project and the ConfuserEx project.

https://github.com/mkaring/ConfuserEx

Noisette
an open-source C# Obfuscator for .NET assembly

https://github.com/XenocodeRCE/Noisette-Obfuscator

Write your Own Virtual Machine

https://justinmeiners.github.io/lc3-vm/

Emerging Threats Rule Documentation Wiki

https://doc.emergingthreats.net/

The Short Villain
Data Exfiltration Via Custom Shorten Links

https://www.reb311ion.com/Misc/B1/

Course materials for Modern Binary Exploitation by RPISEC

https://github.com/RPISEC/MBE

Koodous is a collaborative platform that combines the power of online analysis tools with social interactions between the analysts over a vast APKs repository.

https://koodous.com/

Nightmare

Nightmare is an intro to binary exploitation / reverse engineering course based around ctf challenges. I call it that because it's a lot of people's nightmare to get hit by weaponized 0 days, which these skills directly translate into doing that type of work (plus it's a really cool song).

https://guyinatuxedo.github.io/

PACK: Archivers, exe-compressors, archiver shells and other related utils

https://www.sac.sk/files.php?d=7&l=

PinCTF
This tool is designed to use instruction counting as an avenue for Side Channel Analysis. By counting the number of instruction exeuted

https://github.com/ChrisTheCoolHut/PinCTF

JavaScript Obfuscator Tool

A free and efficient obfuscator for JavaScript

https://obfuscator.io/

Malformed PE Header Kernel Denial Of Service

http://waleedassar.blogspot.com/2020/01/malformed-pe-header-kernel-denial-of.html