Gravatar is a service for providing globally unique avatars and was created by Tom Preston-Werner. It is owned by Automattic, having integrated it into their WordPress.com blogging platform.
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
Flint enables small businesses in the USA to accept credit cards from their smartphone via a free mobile app without requiring extra magnetic card readers. Instead Flint uses the camera to securely capture the credit card number. Client can also type in the card numbers or send an invoice via email which your customer can pay online.