I think its something to do with redesigning the site but I am not certain. The best thing to do until it is resolved is search google and it will take you to the plugin you need. Have a great day!
@schwarzaufweiss plugins which are supposed to be compatible with BuddyPress are tagged as such in the WP Plugin Repository https://wordpress.org/extend/plugins/search.php?q=buddypress
edit- djpaul, didn’t see your post. i took too long to post answer 
Just out of curiosity is there something being changed I am not aware of in regards to plugin searches? I don’t want to miss out on the new stuff. Thanks team!
@mercime @djpaul Thanks. I know… I was only wondering why there is only ONE after a click on the «Plugins» menu point on http://www.buddypress.org
Nothing’s changed. BP bbPress and all other WP plugins have always been hosted at the WordPress.org plugin repository. BP.org with special script “gets” the plugins tagged with BuddyPress for https://buddypress.org/extend/plugins/
I raised a trac ticket for the issue this morning and JJJ/Automattic are aware.
Still “Viewing plugin 1 to 1 (1 total plugins)” – in a WP backend with keyword “buddypress” 442 …
Replying to this thread isn’t going to get the problem resolved any quicker
