It’s not an easy design to pull off since it requires some know-how and programming experience, but there are a few WordPress Themes out there that try to make the process easier for non-programmers.
Mercurial is one such theme (CuckooTap is the other one that I’ve seen). The effect is achieved using shortcodes that lets you specify page elements, fonts, and components that lets you build a custom parallax website using WordPress’s built-in functionality.
Here are a some additional roundups of quality parallax scrolling sites for further inspiration:
- 12 Parallax Sites Done Right from Inspiredology
- 30 Great Parallax Sites from Awwwards
- Mind Blowing Parallax Sites from Web Designer Wall
- Examples and Tutorials from Speckyboy