Anthologize is a free, open-source plugin for WordPress 3.0. It enables WordPress to be used as a platform for publishing electronic texts in PDF, ePUB or TEI format. The plugin enables users to grab their existing blog posts, export content from external feeds or compose new content directly in Anthologize, then apply outlining, create a custom order, and edit content into a single document for export. Anthologize requires a self-hosted or local installation of WordPress.

Abbot is a free tool for converting multiple XML texts with multiple markup schema into a common interoperable file, offered by the MONK (Metadata Offer New Knowledge) Project. It can also read an XML schema file and output procedures, and use them to convert other files into valid XML in alignment with the target schema. While Abbot focusses on TEI, it has been designed to flexibly accomodate other standards and can transform texts into any XML schema required.

Overview is a free, web-based tool for document mining. Developed by and for journalists, Overview is also broadly applicable to other corpus-based research applications. Aside from providing advanced search features such as regular expressions and fuzzy matching, Overview automatically sorts documents according to topic and provides a fast visualization and reading interface. You can apply tags to search results, individual documents, or entire topics to track what you've found, then export the entire document set with its tags to perform further processing or create visualization. It’s been used for qualitative research, social media conversation analysis, legal document review, digital humanities, and more. 

The Lippmannian Device to Gephi is a free, web-based tool for converting the output of the Digital Methods Association's Googlescraper (Lippmannian Device) tool to a format suitable for Gephi visualization. From a Googlescraper file, it generates a GEXF file with defined nodes and weighted edges based on the queries and URLs in the original file. Once loaded into Gephi, the nodes can be resized to emphasize the most important query/URL combinations.

Adobe Acrobat Distiller was software for converting Postscript files to PDF. It was discontinued in 2013, with the exception of a server-based version.

Pandoc can convert documents in reStructuredText, textile, HTML, or LaTeX formats to a variety of other formats including XHTML, PDF, EPUB, docx, odt, and more.

The PDF Toolkit allows users to merge, split, rotate, decrypt/encrypt, compress/uncompress, and repair PDFs. PDFtk Free comes with a command-line tool, PDFtk Server. So you get both the GUI and the command-line interface to PDFtk!

PDFsam Basic or PDF Split and Merge is a free and open-source cross-platform desktop application to split, merge, extract pages, rotate and mix PDF documents. PDFsam Basic is a desktop application freely accessible from the project's page both as source and compiled code. It is available as MSI package for 32-bit and 64-bit MS Windows, .dmg for Mac OS X, .deb package for Debian based GNU/Linux distributions and ZIP bundle for the power users' convenience.

PDFmyURL converts websites to PDFs. Its very easy and straight forward to use. The Pdf rendered are of good quality. Premium, paid features include watermarks and preference configuration (e.g. paper size, table of contents, disabling/enabling links, etc.)

PDFCreator is an application for converting documents into Portable Document Format (PDF) format on Microsoft Windows operating systems. It works by creating a virtual printer that prints to PDF files, and thereby allows practically any application to create PDF files by choosing to print from within the application and then printing to the PDFCreator printer.