Ian Hickson
Ian "Hixie" Hickson is a British-American software engineer, author and maintainer of the Acid2 and Acid3 tests, the WHATWG HTML 5 specification, and the Pingback specification, and the early working draft of Web Applications 1.0. He is known as a proponent of Web standards, and has played a crucial role in the development of specifications such as CSS. Hickson was a co-editor of the CSS 2.1 specification.