Helpful user contributed resources
From ZoneMinder Wiki
FAQ
Installation Procedure
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 - Notes for ARM.
GPU passthrough in VMWare - Notes on using GPUs with Zoneminder running in a virtual machine
Supported
MobileDevices - View ZM from your phone.
Third party
Infrared Leds, Cameras, DC-DC converters etc
External resources of information related to ZM
Arduino - Electronic hardware built for use w/ZM
Community documentation
Various Learnings from getting Zomeminder 1.28.1 working well on Ubuntu Server 14.04
CCTV Laws
California Report on Public Video Surveillance