You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
DaybydayCRM an open-source CRM, to help you keep track of your daily workflow.
BotteletSend data to Google Analytics from the server using PHP. Implements GA measurement protocol.
theiconicSpeedtest Tracker is a self-hosted internet performance tracking application that runs speedtest checks against Ookla's Speedtest service.
alexjustesenIP-Biter: The Hacker-friendly E-Mail (but not only) Tracking Framework
damianofalcioni