Apache is a free and open-source cross-platform web server software.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Lightbox is small javascript library used to overlay images on top of the current page.
PHP is a general-purpose scripting language used for web development.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Recruitee is an integrated cloud-based recruitment management and applicant tracking system.
Silverstripe CMS is a free and open source Content Management System and Framework for creating and maintaining websites and web applications.