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Playnite
Video game library manager with support for wide range of 3rd party libraries and game emulation support, providing one unified interface for your games.
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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.
There's an open issue to make an in-game overlay but realistically it's something that is almost sure to never happen due to the amount of time and resources needed to develop this feature https://github.com/JosefNemec/Playnite/issues/1390
Forgot to add that this exists to use the Steam overlay, but I've not used it so not sure how well it works https://github.com/Alia5/GlosSI
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