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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.
(PalmOS SDK archive](https://github.com/jichu4n/palm-os-sdk/blob/master/sdk-5r4/include/PalmOS.h) - you probably can't code so I will spell it out, it's written in C and so were most PalmOS applications.
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.