iOS Icon Creator 10572
This product works in 2 ways, the first create the layout, folder and nested layers to create all the icons for iPhone, iPad (retina and non-retina) and the App Store and the second slice all the folders to convert the nested layers in .png files with the correct names. This is not just and iOS Icon Creator because the script that you install on Photoshop allows you to slice almost every folder ended on ".png" into a real .png file.