Page Layers is a Mac website screenshot app that converts web pages to Photoshop files featuring separate layers for all page elements.
Page Layers allows you to import existing pages into Photoshop and will save you lots of time when re-designing or improving existing web pages.
Just open any page in the embedded browser and save the page as PSD with layers or plain PNG. Every web page element (every image, link, block, …) will be rendered as separate, named layer. Layer groups will be created according to the site structure.
It is the only OS X website screenshot app you will ever need, unique in its capability to capture web pages with layers.