Apache is a free and open-source cross-platform web server software.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Recruitee is an integrated cloud-based recruitment management and applicant tracking system.
Slider Revolution is a flexible and highly customisable slider.
TYPO3 is a free and open-source Web content management system written in PHP.
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.