Depending on your use case, I feel like you guys might be interested in http://weasyprint.org/. It is an open source HTML to PDF converter written in Python. It passes the Acid2 test and implements CSS Paged Media.
I recently discovered https://github.com/ArthurHub/HTML-Renderer formerly know as https://htmlrenderer.codeplex.com/
PDF generation [...] 100% managed (C#), High performance HTML Rendering library
Depending on your use case, I feel like you guys might be interested in http://weasyprint.org/. It is an open source HTML to PDF converter written in Python. It passes the Acid2 test and implements CSS Paged Media.