Packt is looking for someone to author a "Learning D"

[Vladimir Panteleev via Digitalmars-d-announce]

On Saturday, 14 February 2015 at 17:04:24 UTC, Russel Winder 
wrote:
> Obviously XeLaTeX is the
> correct medium, but AsciiDoc is acceptable as a second best.

During the editing of the Russian translation of TDPL, I've 
worked in MS Word as well. Probably its main advantage is its 
collaboration tools: you can see who added or deleted which 
parts, and toggle between visible edits and final text easily. 
You can also add comments to a text range; by passing the 
document along, this made possible even short conversations.

What would be the equivalent of such collaboration in a 
non-MS-Word-based workflow?