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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.
If it does indeed need local rendering, you might want to look into headless browsers, an seemingly up-to-date list of which can be found at https://github.com/dhamaniasad/HeadlessBrowsers
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.