Billy Hollis
Billy is internationally known for his work on user experience design and native software development. His team, based in Nashville, Tennessee, has created modern apps hailed around the world for innovation and effective use of advanced user interface technologies. Billy has also been training on XAML technologies for over eight years, including some of the first classes available on the Universal Windows Platform. Billy is a Microsoft Regional Director, an MVP for Windows Development, and was named a Software Legend in 2002. You can see Billy at major conferences all over the world, usually doing sessions to help developers to become more focused on designing and developing software that users love.
Here are links to his presentation material: