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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.
You can try the godot 4.0 branch of the Waterways Add-on https://github.com/Arnklit/Waterways/tree/godot4_0 Should have all the features you need, or at least a good starting point to implement your own. I don't know if the godot 4.0 conversion is fully done or not, but it does run in 4.0
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Hence, a higher number means a more popular project.