Gary Marsden was a professor of computer science at the University of Cape Town, pioneer and passionate advocate of HCI for development, and community builder. He became internationally known for his work in mobile interface design, design, and ICT for development (ICT4D) – for which he was a recipient of the ACM SIGCHI’s Social Impact Award in 2007. He went to great lengths to show how mobile technologies were revolutionizing how developing countries were advancing apace. In doing so, he raised the profile of what developing world actually meant. Gary died suddenly of a heart attack on December 27, 2013, and is survived by his wife Gil and his two children, Holly and Jake.