PDF Clown - PDF Clown is an open-source general-purpose library for manipulating PDF documents through multiple abstraction layers, rigorously adhering to PDF 1.7 Specification
IronPDF - SDK for creating and editing PDFs.
PdfPig - Read and extract text and other content from PDFs in C# (port of PDFBox)
Aspose.PDF for Java - Aspose.Pdf is a Java PDF component to create PDF documents without using https://alternativeto.
PDFSharp - Office & Productivity and Development
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents