[@robkk Moderator 10 years, 8 months ago]

You can install a plugin like WP Ulike and use that for rating posts.

Then you can create a custom bbPress view using this function. Add this php code snippet into your child themes functions.php file or in a plugin that can hold custom code snippets like the functionality plugin.

function rkk_register_custom_view() {
 	bbp_register_view( 'top-rated-topics', __( 'Top Rated Topics' ),  array( 'meta_key' => '_topicliked', 'orderby' => 'meta_value_num' , 'post_status' => 'publish' ), false );
 }
 add_action( 'bbp_register_views', 'rkk_register_custom_view' );

Then paste this shortcode in a page called Top Rated Topics.

[bbp-single-view id='top-rated-topics']