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awesome-privacy
Awesome Privacy - A curated list of services and alternatives that respect your privacy because PRIVACY MATTERS.
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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.
I like this, this, this, this and most of all this site. You can translate the latter via DeepL. None of them recommends Collabora though, which easily opens .docx and .xlsx files.
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.