1. FpdiFPDI is a collection of PHP classes facilitating developers to read pages from existing PDF documents and use them as templates in FPDF.
2. FpdfFPDF is a PHP class which allows to generate PDF files with pure PHP. F from FPDF stands for Free: you may use it for any kind of usage and modify it to suit your needs.
3. FPDI-FPDFABANDONED! A kind of metadata package for Composer with fixed dependencies for the latest versions of FPDI and FPDF.
4. FPDI-TCPDFABANDONED! A kind of metadata package for Composer with fixed dependencies for the latest versions of FPDI and TCPDF.