Apache is a free and open-source cross-platform web server software.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Debian is a Linux software which is a free open-source software.
Download Monitor is a plugin for selling, uploading and managing downloads, tracking downloads and displaying links.
Open Graph is a protocol that is used to integrate any web page into the social graph.
WPBakery is a drag and drop visual page builder plugin for WordPress.