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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.
https://discord.gg/northstar is a great place to go as it always has the latest version and news about it, and a lot of friendly people willing to help, and the github if you just want the direct link is https://github.com/R2Northstar/Northstar/releases although it looks like they now have a proper installer for it in the discord (because I don't check there enough apparently)
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.