Getting Started Guide - a good place to start if you are new to ZAP

FAQ - Frequently Asked Questions

ZAP in Ten - a series of short videos about different ZAP features

User Group - the best place to ask questions about using ZAP

Issues - see known issues and feature requests and raise new ones

Bug Bounty Program - for reporting any vulnerabilities

Evangelists - people happy to give ZAP talks or training around the world

IRC - chat with core ZAP developers on the #zaproxy freenode channel (European office hours usually best)