AngularJS is a JavaScript-based open-source web application framework led by the Angular Team at Google.
Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
Google Maps is a web mapping service. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, bicycle and air, or public transportation.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Stripe offers online payment processing for internet businesses as well as fraud prevention, invoicing and subscription management.