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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.
The git repo has some more activity.
https://github.com/tLDP/LDP
There is still a lot of old information though, that doesn't necessarily apply the same way today. It would be nice to see more activity updating stuff.
NOTE:
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Hence, a higher number means a more popular project.