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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.
Another idea would be to do something with Nannou, it's pretty straightforward to get some visually pleasing results and I find these Processing/P5 inspired creative coding libraries allow for a lot of exploration and expression. The Coding Train is a YouTube channel which has dozens of these kinds of projects, translating them into Rust certainly is good exercise.
NOTE:
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Hence, a higher number means a more popular project.