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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 assume some people like the idea of being more in control, in the sense of having the exact recipe for compilation explicitly specified. Some people might also find tectonic [0] as a nice compiler backend. From my experience, latexmk [1] has orked very well for all my LaTeX projects, and I've never looked back.
[0]: https://tectonic-typesetting.github.io/
[1]: https://www.ctan.org/pkg/latexmk/
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.