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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.
Sort-of mentioned this in a previous comment also, but I suppose FLTK is alive and well for regular users of Tiny Core Linux (of whom there are quite a bit, I guess -- myself included). The recently resurrected Dillo web browser also relies on it: https://dillo-browser.github.io/
NOTE:
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