This is intended to be a checklist for tools to have ready: Genaral Skills and Forensics:

GUI

CommandLine

crunch (installed by default on Kali)
tshark (gets installed w/ wireshark)
pngcheck (for identifyingp problems in corrupted png files)
binwalk
volatility (for memory forensics)
Radare (R2)
ILSpy
Java JDK
Python
pngcheck
binwalk
multimon-ng
nmap
metasploit
netcat
nikto
dirbuster
Hashcat (prefered option if you have a gpu)
John the ripper (comes with the following tools ** zip2john (extracting password hashes from encrypted zip files) ** office2john ( a python file for extracting password hashes from protected MS office documents)
git-dumper (for pulling git repository from a web site - as used in the Shrek Fans Only writeup https://spotless.tech/utctf-ctf-2020-shrek-fans-only.html)
crib-drag.py (https://github.com/SpiderLabs/cribdrag) an interactive crib dragging tool for cryptanalysis on ciphertext generated with reused or predictable stream cipher keys (as used in the One True Problem writeup https://github.com/SemahBA/UTCTF-Writeups/tree/master/Cryptography/One%20True%20Problem

pwntools (see https://cryptohack.org/challenges/general/ #5 for example of using pwntools)
katana

SAMPLES: Binaries https://github.com/JonathanSalwan/binary-samples (binary samples from many architectures to check detection tools)