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Reolink Doorbell with 2-way communication
(sh.itjust.works)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Doubt it, HomeKit is Apple only.
But the hardware is definitely capable of it, and the features are definitely exposed via onvif. Sorry I haven’t had time to dig more ever since I got it working with scrypted, if I find anything I’ll try post here.