HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OptiMonk is an on-site message toolkit used to improve conversions using action-based popups ad bars.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
TYPO3 is a free and open-source Web content management system written in PHP.