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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.
You might want to try Clutter, an easy-to-use journaling app that may fit your needs. Clutter comes with an effective search engine that just works. It is accessible from your web browser. Although it doesn't support mobile platforms, it supports any desktop platform. It's a local app that works offline. It backs up data to any folder and doesn't require a lot of storage space. Clutter is more like Google Keep than Evernote, but Clutter is far easier to use than the two.
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.