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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.
Probably the easiest tool for making something like a wiki offline is Obsidian.
I use BookStack and I think it's great. It involves hosting it yourself, but if you're willing/able to do that it's a winner. As mentioned already, Obsidian is also cool and I use it for notes on somep personal projects.
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.