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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 you want to go the same route check out the node-canvas library from the Automattic folks. That essentially lets you use the Browser Canvas API for drawing (but server side instead of in the browser).
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Hence, a higher number means a more popular project.