David Heinemeier Hansson

David Heinemeier Hansson, also known by his initials DHH, is a Danish software engineer, programmer, writer, entrepreneur, and racing driver. He is the creator of Ruby on Rails, a web framework written in Ruby. He is also a partner and chief technology officer at the web-based software development firm 37signals.

Hansson co-wrote ''Agile Web Development with Rails'' with Dave Thomas in 2005 as part of The Facets of Ruby Series. He also co-wrote ''Getting Real'', ''Rework'', ''Remote'', and ''It Doesn't Have to Be Crazy at Work'' with Jason Fried. Provided by Wikipedia