Website terraria.org

DoubleClick is a provider of digital marketing technology and services. Companies come to DoubleClick for expertise in ad serving, media, video, search and affiliate marketing to help them make the most of the digital medium.

Previously Google Apps for Business. G Suite is a cloud-based productivity suite that helps you and your team connect and get work done from anywhere on any device. It's simple to setup, use and manage, allowing you to work smarter and focus on what really matters.

Mandrill is a scalable and affordable email infrastructure service, with all the marketing-friendly analytics tools you've come to expect

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

Express is a fast, unopinionated, minimalist web framework for Node.js

Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.

Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.

Sites who has this tag are verfied by google to use WebMaster tools

Open graph description entity tag

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Open graph image entity tag

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.