-
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.
A partial support was already developed by Andrew Chow in https://github.com/bitcoin-core/HWI (merged just a few days ago), which will probably be released soon; HWI is used by bitcoin-core and several other software wallets, so that release will already bring an improved support − but support for policy registration will be partial and therefore a bit inconvenient to use.
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.