Coloristic: iOS/Android UI Kit App Screens) Coloristic is carefully crafted mobile user interface kit for Photoshop. It contains 60 app screens with hundreds of elements, that can help you to build any iPhone or Android application with ease.
jQuery CollagePlus - an image gallery plugin. This plugin for jQuery will arrange your images to fit exactly within a container. You can define the padding between images, give the images css borders and define a target row height.