Everything below is official. If a website offers you a "Kali download" anywhere else — don't take it; images should come from kali.org, where every release is cryptographically signed.
The project home: downloads, release notes and news.
kali.org ↗All official images in one place — desktop, VM, mobile, ARM, cloud, containers.
kali.org/get-kali ↗Installation and platform guides, written and maintained by the Kali team.
kali.org/docs ↗The official catalogue describing every package Kali ships.
kali.org/tools ↗The official place to ask questions and help others.
forums.kali.org ↗Release announcements and project news, straight from the team.
kali.org/blog ↗The company behind Kali; offers formal training and certification for security professionals.
offsec.com ↗