-
Home Assistant
:house_with_garden: Open source home automation that puts local control and privacy first.
-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
As for "ringing", I'm using Home Assistant (no Apple products in our household), which when the button is pressed is telling a few of my Sonos speakers to play an MP3 of a doorbell from a http URL, and blinking some of my LIFX bulbs. I assume the same is possible with various automation tools.
You'll need HASS, and the UniFi protect integration connected to your CK2+/NVR/UDMPro.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.