Apache is a free and open-source cross-platform web server software.
Google Analytics is a free web analytics service that tracks and reports website traffic.
MonsterInsights is the most popular Google Analytics plugin for WordPress.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
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.
WP-Optimize is an all-in-one WordPress plugin that cleans your database, compresses your large images and caches your site.
WP-PageNavi is a WordPress plugin which adds a more advanced paging navigation interface to your WordPress blog.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.