Jennifer M. Dodd

bbPress Threaded Replies is based on comment-display functions from WordPress 
and topic-display functions from bbPress. Settings can be adjusted on the bbPress 
Forums options page of WordPress. bbPress running as a WordPress plugin is required.
bbPress Threaded Replies is incompatible with the Fancy Editor; enabling threading will 
automatically disable the Fancy Editor.
The plugin checks first in the stylesheet and template directories before reverting 
to the default plugin templates.
<h3>Credits</h3>
Development funded, in part, by Ariel Meadow Stallings and the Offbeat Empire.

bbPress Threaded Replies

Add threaded (nested) reply functionality to bbPress.

cubecolour

When ordered lists are nested, by default each level will have the same style of numbering, but this plugin allows lists nested up to three levels deep to have different styles of number identifiers.
These list styles are also reflected in the visual editor, and to help visualise the nesting hierarchy of ordered lists in the visual editor, a subtle border is shown around lists.

bbPress Threaded Replies vs Nested Ordered Lists