Tutorials

Cache invalidation: Step-by-step tutorial on how to invalidate and purge your cache.
Configuring systemd services: Step-by-step tutorial on how to manage configuration of systemd services.
DNS based GSLB (Global Server Load Balancer): This tutorial shows how PowerDNS can be configured as a Global Server Load Balancer in front of a geographically distributed cluster of Varnish nodes.
Enabling logging with varnishncsa: Step-by-step tutorial to enable request logging with varnishncsa.
Let's Encrypt with Hitch and Varnish (CentOS7): Step-by-step tutorial to setting up Hitch with automated and free certificates from Let's Encrypt.
Object lifetime: TTL, Grace, Keep: Tutorial to understand objects lifetime.
Securing multi tier Varnish environments: How to make sure certain Varnish tiers are only accessible by other Varnish tiers.
SELinux FAQ: Frequently asked questions about SELinux and Varnish Enterprise
Varnish Monitoring: Monitoring your varnish installation.
Caching POST requests: How to cache POST requests with Varnish.
Logging Hits and Misses: How to tag request type (hit, miss, pass, etc.).
VSL cheatsheet: varnishlog, varnishncsa and ready-to-use VSL queries.
Getting started: How to install and get started with Varnish.

Manuals
Varnish Live
Varnish Cloud
Varnish Cache Plus
Varnish High Availability
Varnish Controller
Varnish Custom Statistics
Varnish Broadcaster
Varnish WAF
Varnish Administration Console

News
Open Source Varnish Cache Denial of Service
Varnish Cache Plus 6.0.10r1
Varnish Discovery 1.4.0
Varnish Controller 4.1.3
Varnish Custom Statistics 6.2.2
News archive