ThemeForest - 907 v3.1.5.5 - Responsive WP One Page Parallax
Great one page WP theme with tons of options and features. Not only will the PARALLAX feature be on the main one page, but you can also select a DEFAULT PARALLAX section and even a "page section" to be displayed across all other pages... AND You can change parallax/page sections per blog post/pages, choosing a different one or setting to none.