Paperless-ngx : A community-supported supercharged document management system: scan, index and archive all your documents
Typst : Typst is a new markup-based typesetting system that is designed to be as powerful as LaTeX while being much easier to learn and use. Typst has:
Built...
HTML2PDF : HTML2PDF is a HTML to PDF converter written in PHP.
It allows the conversion of valid HTML 4.01 in PDF format, and is distributed under OSL.
Prince : Convert your HTML documents to PDF.
Beautiful printing with simple CSS.
Prince is an ideal printing component for server-based software, such as web a...
CouchDB : Apache CouchDB™ is a database
that uses JSON for documents,
JavaScript for MapReduce indexes,
and regular HTTP for its API
If you need to convert files from one markup format into another, pandoc is your swiss-army knife.