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ExcelDna
Excel-DNA - Free and easy .NET for Excel. This repository contains the core Excel-DNA library.
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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.
ExcelDNA is an open source project that takes care of a lot of the complexity of the COM API and lets you use .Net for writing Excel Addins but not for other Office applications. Their latest versions should work with .Net 5+.
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