-
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 are ZealOS (https://zealos.net) and TinkerOS (https://github.com/tinkeros/TinkerOS). Zenith has an old and messy codebase that is no longer maintained. I have yet to see it get any updates.
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.