BBP Core is a WordPress plugin by SpiderDevs that adds extra features to your forum, including olved topics, private replies, forum statistics etc.
statistics Dashboard: A glimpse of forum statistics on the plugin dashboard, including – total number of forums, topics, replies, tags etc.
Private Reply: Create replies on topics privately, which only forum owners can see, it remains hidden to other customers.
Solved Topics: Mark topic as solved / unsolved. Solved topics shows ‘Resolved’ badge at the end of topic title.
Download and info: https://wordpress.org/plugins/bbp-core/