Aspose.PDF for Java - Aspose.Pdf is a Java PDF component to create PDF documents without using https://alternativeto.
PDF to X - PDF to X is used to convert PDF documents to Word (.doc)/WordPad (.rtf) documents, HTML web pages, JPG/PNG/BMP/TIF/GIF/PCX/TGA images and plain text files in batch mode. It works without Adobe Acrobat or Adobe Reader.
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents
IronPDF - SDK for creating and editing PDFs.
iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
Qoppa jPDFFields - Use jPDFFields Java PDF SDK to work with interactive PDF forms in both AcroForm and XFA formats.