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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 could take a look at godotengine.org an open source game engine, which is in fact very suitable for building applications as well. It comes with excellent UI components and has a setting which tells the engine not to update 60 times per second and instead only update when something changes.
You might want to use Avalonia UI. There is an OSS project that has most of what you want, which might make a good starting point.
Or fork/contribute to an OSS C# option such as this https://github.com/umaranis/MindMate
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.