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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.
I've had a Raspberry Pi (mode 3B+) for a little while now, but last year for work, I looked into digital signage for the Pi platform, and came across piSignage (https://pisignage.com/). This is software you can run from an SD card directly on a Raspberry Pi that will let you upload video files and create playlists to automatically run. The Pi can plug up to an HDMI capable projector and just set to run the playlist over and over again.
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.