PHP package : helori/laravel-files
This package brings utilities to manipulate PDF and images files. It relies on system commands as gs, convert, optipng, jpegoptim... and on third-party packages as FPDI. Main features are images and PDF compression (without the hassle of understanding how compressors work), writing on PDF files, combining PDF files, optimizing images for SEO, and much more !
PHP package : helori/php-sign
PHP-Sign is a framework agnostic PHP library to sign PDF documents. It allows you to integrate electronic signature in your web application without having your code deeply tied to a specific signature provider. Currently, supported compatible providers are Yousign, Universign and Docusign.