SproutCMS

Fpdi

Implements FPDI library without having to hack up its source code (much).
FPDI is a PDF document importer which works with FPDF, so you can use nicely designed PDFs as templates,
and then dynamically add data to them.
See https://github.com/Setasign/FPDI or https://www.setasign.com/products/fpdi/about/