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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.
it seems that GNOME doesn't support the tray since 3.26. You can find out more here. I believe that this link also takes you to a project called Hardcode-Tray, which they describe above. I suggest you give it a read.
NOTE:
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Hence, a higher number means a more popular project.