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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.
SilentNotes works completely offline if you want, synchronization to an online service of your own choice is completely optional. It works on Android and Windows.
Your link seems broken, but I think you meant this app https://github.com/farmerbb/Notepad ?
NOTE:
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Hence, a higher number means a more popular project.