Portable Document Format (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.

Snow Leopard's Preview can add text but it cannot add an image into a PDF document. I tried.

This free software can:

http://code.google.com/p/formulatepro/downloads/list

Once a PDF is opened in FormulatePro (yes it really is fully free and open source despite the name), go to File » Place Image...