Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
Twenty Ten is the default WordPress theme for 2010.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.