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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 really depends on what type of GUI you are trying to make. For a general guide, see https://github.com/ClaudeMetz/UntitledGuiGuide. If you are making a complex GUI then https://git.sr.ht/~raiguard/flib/tree/master/item/gui-lite.lua is extremely useful (and I find it useful even without).
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.