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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.
While https://github.com/north-road/qgis-processing-r development doesn't seem to be super-active, it still passes plugin tests and the relevant section is still included in latest user manual - https://docs.qgis.org/testing/en/docs/user_manual/processing/3rdParty.html#r-scripts . (I don't use, though maybe I should .. )
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.