ExpressionEngine is a free and open-source CMS.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
MailerLite is an email marketing tool and website builder for businesses of all shapes and sizes.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.