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unbound-generics
Specify variable binding in syntax trees using GHC.Generics (reimplementation of Unbound)
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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 attribute grammars are underrated. Helium and the abandoned UHC use the attribute grammar system developed at Utrecht University. Here is the manual. It is implemented as a preprocessor like Alex and Happy, so it can be a bit hard to setup. I have made two small example repositories here and here.
Something worth checking is how you are going to implement/represent binders, I would suggest looking into a library like unbound-generics
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