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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.
Godot is an option. It features official support for GDscript (similar to python) and c#, but the engine has the ability to add other language bindings that are community-maintained. I cannot provide any feedback on using any custom bindings as when I was tinkering with Godot I used GDscript, but the engine itself is pretty nice and it is open source. Here is a link to a repo that has the JavaScript bindings: https://github.com/Geequlim/ECMAScript
NOTE:
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Hence, a higher number means a more popular project.