PDF

• Atom
• Make sure Atom's core Markdown Preview package is enabled
• Markdown to PDF for Atom
• paste-table for Atom
• LibreOffice Calc
• (Optional) vim-mode-plus for Atom
• (Optional) Make sure Atom's core autosave is enabled.

Accessibility and Drupal expert Everett Zufelt was kind enough to look at the PDF e-book version of the Definitive Guide to Drupal 7.

1. The PDF is tagged, this is good. In order for a screen-reader user to interact with a PDF the file needs to be parsed into an accessibility API / virtual buffer. Tagging makes it easier and faster for the file to be parsed.