Opia

Opia is one of favorite I worked on as a developer. The design was very rich and original with a lot lot of different sections, custom post types and smart animations.
Opia being part of the Warner group, we had to be more perfect on the delivery, visually but also in term of usability.
The client wanted a page builder, we choose SiteOrigin as it was lightest around and was based on wordpress's widgets, so it was easy to create custom widgets with ACF while being quite flexible too.