Website thebostoncalendar.com

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.

Open source shopping cart solution

Yelp's goal is to connect people with great local businesses.

Websites embedding Google maps.

Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.

Google Tag Manager makes it easy for marketers to add and update website tags including analytics, remarketing, and more.

Websites that accepts payments with American Express.

Websites that accepts payments with Visa.

Websites that accept payment with JCB

Websites that accepts payments with MasterCard.

Stripe is a developer-friendly way to accept payments online and in mobile apps.

PayPal is a American international e-commerce service that enables companies and individuals to send money and to accept payments without revealing any financial details.

Mailjet is a real-time Cloud Emailing platform.

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.

Track Your Results. Get the stats on your campaigns and subscribers, so you can improve your content every time you send, and tailor your newsletters to your ...

Phusion Passenger - a.k.a. mod_rails or mod_rack - is a web server and application server, designed to be fast, robust and lightweight. Administration tools allow you to gain insight into web application operations and server performance.

Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity. It lets you write beautiful code by favoring convention over configuration.

AddEvent is an Add to Calendar button, a Subscribe to Calendar button and Event Management.

Online event registration widget.

Open graph url entity tag

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

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

Typekit is the easiest way to use real fonts on the web. It's a subscription-based service for linking to high-quality Open Type fonts from some of the worlds best type foundries.

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.

The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.

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

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

Sites using Html 5 Video Tag

A scheme.org entity that represents an event happening at a certain time and location, such as a concert, lecture, or festival. Ticketing information may be added via the 'offers' property. Repeated events may be structured as separate Event objects.

A scheme.org entity that represents entities that have a somewhat fixed, physical extension.