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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.
I think the best one right now for python is "beeware": https://beeware.org/
You also have Kivy which is prety good: https://kivy.org/
NOTE:
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Hence, a higher number means a more popular project.