Content notes
These are ways to create notes for content authors. https://www.drupal.org/project/editor_note Notes are viewable in the content...
These are ways to create notes for content authors. https://www.drupal.org/project/editor_note Notes are viewable in the content...
https://www.drupal.org/project/views_bulk_operations https://www.drupal.org/project/views_bulk_edit Depends on VBO. Unable to...
How is this different than Workbench Access?
Grant editing permissions to content based on menu hierarchy or taxonomy term. This covers a lot of use cases pretty well but if your needs fall outside of this you may need something else.
Editors can create notes in the content edit form.
Is it possible to build something like this with Comments?
Highlight text in your content and create a note which appears for other editors in a sidebar. Pretty good UI, but very experimental module.