PDFBox - Java PDF library

•    Java

Apache PDFBox is an open source Java PDF library for working with PDF documents. This library allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents. It provides support for adding bookmarks, fonts, text extraction, Encryption, PDF printing and lot more.

PDFClown - PDF library

•    Java

PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like checkbox, button, list box etc, Compression, text extraction.

HexaPDF - A Versatile PDF Creation and Manipulation Library for Ruby

•    Ruby

HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. It supports Creating new PDF files, Manipulating existing PDF files, Merging multiple PDF files into one, Extracting meta information, text, images and files from PDF files, Securing PDF files by encrypting them and optimizing PDF files for smaller file size or other criteria.

iText - Java PDF library

•    Java

iText is one of the popular and widely used PDF library. It is used to generate PDF documents dynamically. Mostly web developers will love it to generate PDF documents and reports based on data from an XML file or a database and serves it to the browser. It has support of adding bookmarks, watermarks, Encryption, Form filling and lot more.

PDF Library - PDF manipulation in .NET

•    VBNET

A library for PDF manipulation implementing Adobe PDF standard version 1.7. This library allows to read PDF files and apply changes to them, it is written in .NET 2.0 using Visual Studio 2005. Writing and Parsing PDF is supported.

TCPDF - PHP class for generating PDF

•    PHP

TCPDF is a PHP class for generating PDF documents without requiring external extensions. TCPDF Supports UTF-8, Unicode, RTL languages, XHTML, Javascript, digital signatures, barcodes and much more.

PDFSharp - Create and process PDF in .NET

•    CSharp

PDFsharp is the Open Source .NET library that easily creates and processes PDF documents on the fly from any .NET language. The same drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. Neither Adobe's PDF Library nor Acrobat are required.

unipdf - Golang PDF library for creating and processing PDF files (pure go)

•    Go

UniDoc's UniPDF (formerly unidoc) is a PDF library for Go (golang) with capabilities for creating and reading, processing PDF files. The library is written and supported by FoxyUtils.com, where the library is used to power many of its services. Multiple examples are provided in our example repository https://github.com/unidoc/unidoc-examples as well as documented examples on our website.

borb - Library for reading, creating and manipulating PDF files in Python

•    Python

borb is a pure python library to read, write and manipulate PDF documents. It represents a PDF document as a JSON-like datastructure of nested lists, dictionaries and primitives (numbers, string, booleans, etc).

PDFJet - PDF library for Java and .NET

•    Java

PDFjet is a high performance PDF library for Java and .NET. It has support of drawing points, lines, box, polygons etc. It supports unicode text, embedding images, embedding hyperlinks and lot more. Its simple to use table class helps to generate flexible reports.

MuPDF - A Lightweight PDF, XPS and E-book viewer

•    C

MuPDF is a lightweight PDF, XPS, and E-book viewer. It renders text with metrics and spacing accurate to within fractions of a pixel for the highest fidelity in reproducing the look of a printed page on screen. It supports PDF 1.7 with transparency, encryption, hyperlinks, annotations, searching and more. The viewer is small, fast, yet complete. It supports many document formats, such as PDF, XPS, OpenXPS, CBZ, EPUB, and FictionBook 2. You can annotate PDF documents and fill out forms with the mobile viewers (this feature is coming soon to the desktop viewer as well).

jPod - PDF manipulating and rendering framework

•    Java

jPod is a PDF manipulating and rendering framework. It provides functionality to read, verify the document against the PDF specification. It also provides content stream and rendering framework. It could able to create new document and do incremental updates.

Pandoc - General Markup Converter

•    Haskell

Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. It an convert documents in markdown, reStructuredText, textile, HTML, DocBook, or LaTeX to HTML formats, Word processor formats, PDF and other markup formats.

Sioyek is a PDF viewer designed for reading research papers and technical books

•    C

Sioyek is a PDF viewer designed for reading research papers and technical books. It can quickly search and open any file you have previously interacted with using sioyek. It supports document search and navigate to referenced figure or bibliography item. It has also support for Bookmarking pages, Highlighting text and lot more.

Ghostscript - Document Rendering and Conversion

•    C

Ghostscript is a rendering and conversion engine for page description languages, including Postscript and PDF. It has ability to convert PostScript language files to many raster formats, view them on displays, and print them on printers that don't have PostScript language capability built in.

vue-pdf - vue.js pdf viewer

•    Javascript

since v2.x, the script is exported as esm. The url of the pdf file. src may also be a string|TypedArray|DocumentInitParameters|PDFDataRangeTransport for more details, see PDFJS.getDocument().

Poppler - PDF rendering library

•    Linux

Poppler is a PDF rendering library based on the xpdf-3.0 code base.

Bad-Pdf - Steal Net-NTLM Hash using Bad-PDF

•    Python

Bad-PDF create malicious PDF file to steal NTLM(NTLMv1/NTLMv2) Hashes from windows machines, it utilize vulnerability disclosed by checkpoint team to create the malicious PDF file. Bad-Pdf reads the NTLM hashes using Responder listener. This method work on all PDF readers(Any version) and java scripts are not required for this attack, most of the EDR/Endpoint solution fail to detect this attack.

Android PDF Viewer

•    Java

Andorid PDF Viewer is a viewer for PDF-Files on ANDROID mobiles. The implementation will be a port of the pdf-renderer which is published by SUN under the LGPL: https://pdf-renderer.dev.java.net/. The first version will be very slow, so do not hurry...

WPF PDF Viewer

WPF PDF Viewer