CTF

Pwn

Pwn-tips - https://github.com/Naetw/CTF-pwn-tips
Pwnshop - https://github.com/alanvivona/pwnshop (Good blogs!)

Reversing

Reversing.kr - http://reversing.kr/

Exploit Development/Binary Exploitation

Exploit-Exercise - https://exploit-exercises.lains.space/

Learning

CTF101 - https://ctf101.org/
Awesome-ctf - https://github.com/apsdehal/awesome-ctf

Heap Exploitation

Main_arena - https://github.com/bash-c/main_arena_offset