Helpful user contributed resources
FAQ
Installation
Ubuntu specific guides (currently more updated than official guides)
Common problems migrating from old versions to new versions
API installation/validation guide- (use the link above first, if you face problems, refer to this link)
Using a dedicated Hard Drive - Adding HDDs.
Single Board Computers - ARM devices.
GPU passthrough in VMWare - Notes on using GPUs with Zoneminder running in a virtual machine
Supported
Beginner hardware - What cameras to start with.
MobileDevices - View ZM from your phone.
Third party
Utilities - Software for ZM
Infrared Leds, Cameras, DC-DC converters etc - Hardware
External resources of information related to ZM
Community docs
Various Learnings from getting Zomeminder 1.28.1 working well on Ubuntu Server 14.04
Hardware Recommendations - What computer hardware to use.
CCTV Laws