CTFtime
Write-ups for different CTFs on CtfTime.org
write-ups
A compilation of various write-ups written on different problems, challenges, and machines, categorized based on the platform they were published on.
PicoCTF
Write-ups for Challenges on PicoCTF
TryHackMe
Write-ups for TryHackMe Machines
VulnHub
Write-ups for VulnHub Machines