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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.
The font, or your handwriting, is questionable for math as math requires high symbolic rigor. XKCD's author is very rigorous about kerning, and occasionally makes jokes about it. You might split the difference with XKCD's font or some other clean "handwriting" font. (This was the original purpose of Comic Sans, however that font has been derided into meme-fodder.)
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.