The last Android Auto app I expected to enjoy was Adobe Acrobat - but it's actually useful ...

Drop in a PDF, YouTube link, audio file, or webpage, and GitMind builds a structured mind map and summary in seconds.

OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL open source licenses.

If you're considering PuppeteerSharp for PDF generation, here's the version of the story that doesn't show up in the "getting started" docs.