"Docsplit is a command-line utility and Ruby library for splitting apart documents into their component parts: searchable UTF-8 plain text via OCR if necessary, page images or thumbnails in any format, PDFs, single pages, and document metadata (title, author, number of pages...)"

Pandoc is a tool for converting from one markup format to another. It can read markdown and (subsets of) reStructuredText, HTML, and LaTeX, and it can write markdown, reStructuredText, HTML, LaTeX, ConTeXt, PDF, RTF, DocBook XML, OpenDocument XML, ODT, GNU Texinfo, MediaWiki markup, groff man pages, and S5 HTML slide shows.

OT is a technology for supporting concurrent editing of single shared document by a number of parties. OT provides for a way of transmitting the edits that one party is performing against the document to all other parties, but much more importantly it provides a way to fix issues that arise along the way from concurrent edits being performed.