normen

Lets you move all forum topics from one forum to another.

BP Move Topics

Lets you move all forum topics from one forum to another.

destroflyer

Shows a read/unread icon next to threads (Marks topic as read when the user visits it). 
A “Mark all topic as read” button on each page allows to set the topics on that page as read. 
Developed for: http://jmonkeyengine.org

bbPress Unread Posts

Displays a read/unread icon next to threads and offers a "Mark all topics as read" button for each forum page.

BP Move Topics vs bbPress Unread Posts