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.
HERE is a PaaS for creating custom maps, visualize location datasets, gather insights and buy and sell location assets.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.