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.
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.
LiveChat is to Loved worldwide Used by over 24,000 companies delivering answers to questions from the customers on the spot. This premium live chat software and help desk software turns support teams into customer service rockstars.