cdnjs is a free distributed JS library delivery service.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Rewardful is a way for SaaS companies to setup affiliate and referral programs with Stripe.
SweetAlert is a JavaScript library that provides alternative alert and modal dialog boxes for web applications, with customisable features, aiming to improve the user interface of the default browser dialogs.