pdfmake would make a nice addition to any project where you need to generate PDFs. Seeing how easy it is to implement has me thinking of how I could use it to generate highly styled documents in all manner of apps (e.g. invoices, charts, reports, etc).
In-browser – Print PDFs directly in the browser or delegate it to your NodeJS backend. Use the same document definition in both cases.
Fully declarative – Forget about manual x, y calculations. Declare document structure and let pdfmake do the rest.
Powerful layout engine – Use paragraphs, columns, lists, tables, canvas, etc… Declare your own styles, use custom fonts, build a DSL and extend the framework.