PDFtk

It is a Portable Document Format (PDF) viewer that is built with HTML5. It is community-driven and supported by Mozilla Labs. The goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

pdfmake, client/server side PDF printing in pure JavaScript.

Create, edit, and review PDFs. E-sign documents and collect signatures. Collaborate with your team. All in one app.

It is a visual rendering engine for HTML and CSS that can export to PDF. It aims to support web standards for printing. It is free software made available under a BSD license.

Docparser is a cloud based document processing solution and workflow automation software. Docparser makes it easy to convert PDF documents into structured data and automate document based workflows.

It provides developers with a tool to convert their HTML documents to PDF with high-fidelity. Packages are available for Node.js, Python, and PHP and the API allows any programming languages to be used.

DocSpring is a service that makes it easy to generate PDFs by posting data to an API. You can upload PDF templates and configure form fields in our web-based template editor. You can also generate PDFs by filling in an online form.

OpenPDF is a free Java library for creating and editing PDF files with a LGPL and MPL open source license. OpenPDF is based on a fork of iText.

It is a software development kit (SDK), consists of PDF SDK and PDF Conversion SDK. With this SDK, even developers with limited knowledge of PDF can quickly integrate professional PDF functions with just a few lines of code on multiple platforms.

It makes it easy for developers to generate beautiful PDFs. It is a comprehensive solution with an open-source library to design your documents, a simple API to generate your documents, and a cloud platform to host and track your documents.

AmindPDF is an all-in-one PDF editor that allows you to easily create, edit, convert, sign, OCR PDF files. You can convert from and to PDF directly from Word, Excel, Image, and other popular file types.

A tool which creates PDF documents interactively using HTML or Pug (a shorthand for HTML). It allows complex layouts to be defined with CSS and JavaScript while writing the content in a friendly, minimal syntax close to Markdown or LaTeX.

FSharpx.Collections is a collection of datastructures for use with F# and C#.

It is an all-in-one online platform for working with PDF documents. Here, you can upload any PDF or Image and edit it. Also, you can edit your PDF files as well as sign them electronically and protect them with password and watermark if needed. It also has an extensive fillable Forms Library with many useful forms. You can just find the one you need and fill it out.

Convert, edit, share, and collaborate on PDFs and scans in the digital workplace.

It is used as Portable Document Format (PDF) document information extractor.

It is an online editor for building next-generation documents with HTML and CSS. Create modern documents that combine the customizability of traditional Word documents with the structure of LaTeX.

It is a fast eSignature PDF editor that lets you digitally sign PDF documents, fill, read, edit and comment PDFs, making your editing and signing workflow smooth.

It is a command-line tool and C++ library that performs content-preserving transformations on PDF files. It supports linearization, encryption, and numerous other features.