Long time organiser of the Web Directions Conference series, John Allsopp has been working on the Web for nearly 30 years.
He's been responsible for innovative developer tools such as Style Master, X-Ray and many more. He's spoken at numerous conferences around the World and delivered dozens of workshops in that time as well.
His writing includes two books, including "Developing With Web Standards" and countless articles and tutorials in print and online publications.
His "A Dao of Web Design", published in 2000, is cited by Ethan Marcotte as a key influence in the development of Responsive Web Design, who's acclaimed article in 2010 begins by quoting John in detail, and by Jeremy Keith as "a manifesto for anyone working on the Web".