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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 have nothing constructive to add except that OpenSSL has a long history of producing vulnerabilities so much so that Google has created their own fork publicly available here: https://boringssl.googlesource.com/boringssl/ (used in chromium, chrome, and android).
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.