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Ferdi
Discontinued Ferdi is a free and opensource all-in-one desktop app that helps you organize how you use your favourite apps
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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.
no idea if helpful or your way past this, but https://github.com/monicahq/monica/blob/master/docs/installation/providers/docker.md gives the sql info. ( I am kinda new to docker crap so...)
I've been thinking about it myself - seems like a massive undertaking if you want to support all the different IMs that people use, but it might be possible to refurbish the chat-integration code from ferdi or the IM-bridges from Matrix in order to make it manageable.