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prelude
Prelude is an enhanced Emacs 25.1+ distribution that should make your experience with Emacs both more pleasant and more powerful.
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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.
Your friend might like Which-Key too https://github.com/justbur/emacs-which-key
In case it is of use for anyone else, I adapted this nifty little bit of functionality from prelude for evil users:
You may be interested in this thing called GNU Emacs / N Λ N O
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.