WordPress itself is an open source project, and bbPress is based on WordPress. Any framework that it was based on when it first began has long been replaced by core functions. Is there anything in particular that you wanted to know?
Yes, I understand what you mean, but as I remember I’ve been a website, which is released by Automattic, and it says that it’s for a project of a PHP framework, that’s a framework based on wordpress/bbpress, it’s the core of wordpress/bbpress, users can use the framework to build up new websites.
But I can’t find the website now.
Are you sure that you aren’t thinking of BuddyPress? BuddyPress is a social networking platform built on WordPress as a framework.
Pretty much everything that Automattic does uses WordPress as a framework. There is no “core of wordpress/bbpress” because WordPress is the core.
Not BuddyPress, perhaps I made a mistake, thank you very much for your reply.