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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.
Why built-in? https://github.com/nvim-orgmode/orgmode works just fine.
b) org-mode is a massive project. If you want it in neovim go contribute to something like https://github.com/nvim-neorg/neorg.
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.