Offensive security

Hacking tools for Hacker

A long list with some valuable references and recommendations here

A large list of jewels (repos) for redteamers here

Awesome Hacking - A collection of various awesome lists for hackers, pentesters, and security researchers here

Finding Vulnerable Systems Across the Internet with Netlas.io here

Penetration testing tools for blue team here

Hack the box

Valuable HackTheBox cheatsheet and walkthrough pentest machine here

SQL injections

This repository contains a advanced methodology of all types of SQL Injection. here

Subdomain Enumeration

Subdomain enumeration guide for performing a good subdomain enumeration here

Intelligence tools

A curated list of amazingly awesome open source intelligence tools and resources here

Google dorks basics for bug bounty here

Cloud

Cloud agnostic

Hacking the cloud is an encyclopedia of the attacks/tactics/techniques that offensive security professionals can use on their next cloud exploitation adventure. The goal is to share this knowledge with the security community to better defend cloud native technologies. here

Azure

Opensource tool for Azure redteam here

Google Cloud Platform

gcpHound : A Swiss Army Knife Offensive Toolkit for Google Cloud Platform (GCP) here

Mobile

The mobile hacking cheatsheet here

Vulnerabilities

Bug Alert is a service for alerting security and IT professionals of high-impact and 0day vulnerabilities here

Pentest Lab

This site provide free labs to exploit vulnerabilities here