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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.
It pretty much is, though? They have a donation-based file server for some releases of stuff (I guess...I've donated and seen it mentioned as a thing that exists but never looked at it, I just downloaded the publicly available stuff). So, you can run their work right now in an emulator completely for free. And their FPGA cores are also open source, so you can go buy yourself a Nexys4DDR FPGA and build a MEGA65 at home for just the cost of the dev board and support components (a few hundred bucks, I guess, since it's a pretty powerful FPGA compared to a lot of other retro projects).
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