Braintree, a division of PayPal, specializes in mobile and web payment systems for ecommerce companies. Braintree provides clients with a merchant account and a payment gateway.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Omise is a payment gateway for Thailand, Japan and Singapore. Providing both online and offline payment solutions to merchants.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.