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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 think browsergame is the correct term. It's just that most of those mid-2000 games all were replaced by Apps. UniEngine looks pretty close. Judging from the folder structure, I don't think it's a great example, you can certainly look for ideas.
NOTE:
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Hence, a higher number means a more popular project.