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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.
If you want ideas for categories, have a look at the DMOZ category tree; it's huge but you can mess around with it. The important thing is, you're not being graded. What matters is whether this helps or hinders you when keeping track of your stuff -- if it doesn't, dump the part that fails and replace it.
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.