You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
A functional and useful dashboard for pfSense that utilizes influxdb, grafana and telegraf
VictorRobelliniThe missing REST API package for pfSense
jaredhendrickson13REST based API interface for pfSense 2.3.x and 2.4.x to facilitate devops
ndejongThis is a port of the original WireGuard UI bits as implemented by Netgate in pfSense 2.5.0 to a package suitable for rapid iteration and more frequent updating on future releases of pfSense.
rcmcdonald91Integrate Kubernetes and pfSense
travisghansen