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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.
To an extent you are right, lots of Amiga software and hardware has traditionally been commercial and proprietary in a (maybe misguided) effort to save the platform.
That said, there is a lot of open source hardware too nowadays, here's a very helpful list:
https://github.com/grovdata/Amiga_Sources
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.