GoCache is an in-memory key:value store/cache similar to memcached that is suitable for applications running on a single machine.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Typekit is an online service which offers a subscription library of fonts.