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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 can't you change? With tools like https://github.com/regebro/hovercraft you only need a browser and no extra software.
I use Zim wiki, it has a HTML exporter with a presentation template so I can convert my notes to a presentation. Similar thing can be done with emacs org-mode.
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.