QuickLook Plugins List

A QuickLook plug-in for viewing iPhone crushed Png files (native iPhone format).

From the developers, atPurpose Technologies:

The direct download link to PngUncrush QuickLook plug-in, which is free to download and use, is:
http://atpeek.download.atpurpose.com/PngUncrush.zip

The atPeek project page which uses this plug-in is at:
http://www.atpurpose.com/atPeek/