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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.
Or a more affordable option: https://www.olimex.com/Products/Retro-Computers/AgonLight2/o.... There is also this version: https://heber.co.uk/agon-console8/
This is available on Mouser and Digikey and it has started to develop a good community around it.
I've just been porting the plasma demo that I wrote for a Z80+TMS9918 video chip to it (still WIP): https://github.com/jblang/z80demos
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.