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XNAGameStudio
The Education library from the Xbox Live Indie games repository, valuable for MonoGame Developers for advanced samples
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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 agree with you, the wealth of XNA documentation that's out there will be largely compatible with MonoGame, if not fully. In fact, I think MS still hosts XNA documentation. There's also http://rbwhitaker.wikidot.com/xna-tutorials and https://github.com/simondarksidej/XNAGameStudio/wiki/RiemersArchiveOverview for some tutorial approaches with lots of examples.
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