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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.
There was one quarter years ago when Microsoft ended up being the largest code contributor to the Linux kernel, but all of their code was paravirtual hardware support for Linux to run on their closed-source hypervisor, called Hyper-V. They contributed it in order to run Linux more efficiently in their Azure cloud, which is popular. One of Microsoft's niche Linux distributions is mainly for Azure Linux instances.
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.