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.

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. 

Tabello is a research tool that makes it easy to extract table data from PDFs to Excel. It is optimized for PDFs where tables are found on only a few pages (e.g. annual reports, research reports, academic papers) of a document. With Tabello you simply drag a selection box around the table you want to convert and it instantly becomes ready to paste into Excel.

As Tabello comes as a Chrome extension you don't need to download/upload files but continue to work in your browser, making it always available.

A tool to convert Normal/Scanned PDF and Image to Word, Excel, PPT, Keynote, Pages, Text, etc. on Mac.

Features:

Convert PDF to Word (.doc), Excel (.xlsx), and More Common Office Format Files

Convert PDF to Pages and Keynote

Convert PDF to Graphics Files

Convert Scanned PDF with Accurate OCR

Convert Multilingual PDF Files

Support Password-Restricted PDF Files

Extract Portions of Text, Image or Table for Reconstruction of Document

Smallpdf is a free online tool to compress, merge, split and convert PDF documents. It is simple to use and free to use. It can be useful to compress research papers, merge several documents together or extract graphs and images from PDF files.

Full-featured app for reading, annotating, organizing, and sending PDFs. Offers ability to annotate PDFs with pen, highlighter, audio recordings, and photos. For iPad or Android tablet.

Plone is a powerful, flexible, open source Content Management System (CMS) built on top of Zope application server and CMF.

Features:

- Flexible and adaptable workflow

- Customisable

- Free add-ons

- Versioning, history and reverting content

- Support for multiple mark up formats

- Multilingual content management

- RSS feed support

- WebDAV and FTP support

- WYSIWYG

- Integrates with Active Directory, Salesforce, LDAP, SQL, Web Services, LDAP and Oracle

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.)