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QuestPDF
QuestPDF is a modern open-source .NET library for PDF document generation. Offering comprehensive layout engine powered by concise and discoverable C# Fluent API. Easily generate PDF reports, invoices, exports, etc.
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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.
If you have slightly complex documents, give Weasyprint a try, unlike WkHtmlToPdf it support most of CSS Paged Media (friendlier site) which is pretty much mandatory as you get stuff like a proper TOC, running numbers, margins, page breaks etc.
I think you should ask these questions in related discussion on Github: https://github.com/QuestPDF/QuestPDF/discussions/491