Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.
Google Cloud DNS is a scalable, reliable and managed authoritative Domain Name System (DNS) service running on the same infrastructure as Google. It has low latency, high availability and is a cost-effective way to make user applications and services available to users.
PHP: Hypertext Preprocessor is a server-side scripting language designed for Web development, but also used as a general-purpose programming language. PHP code may be embedded into HTML code, or it can be used in combination with various web template systems, web content management systems, and web frameworks.
The Prototype JavaScript Framework is a JavaScript framework as part of the foundation for Ajax support in Ruby on Rails. It is implemented as a single file of JavaScript code, usually named prototype.js.
script.aculo.us is a JavaScript library built on the Prototype JavaScript Framework, providing dynamic visual effects and user interface elements via the Document Object Model (DOM). It is most notably included with Ruby on Rails and Seaside, but also provided separately to work with other web frameworks and scripting languages.
Tripadvisor is an online travel agency that assists customers in gathering travel information with user-generated content like posting reviews, opinions of travel-related content and engaging in interactive travel forums. It also offers online hotel reservations and bookings for transportation, lodging, travel experiences, and restaurants