TouchCopy lets you browse and copy photos on your iPod or iOS device to your computer or set a photo as a Windows Desktop Background.
TouchCopy can copy photos which were saved to your device using iTunes as well as photos which were taken by the iPhone camera.
The Photos viewer includes a control bar :-

TouchCopy lists all your photo Albums (folders), Events and Faces on a list on the left. Clicking on one of these items will display all the photos contained within that item.
To view a large version of an image....
To return to the thumbnail views, click the "Close" button at the bottom of the window.
Select an Album, Event or selection of photos and then copy them to your computer hard drive by clicking "Copy Photos" button in the TouchCopy photos tool bar. Alternatively, click "Copy to PC" in the main TouchCopy control bar.
TouchCopy will copy the selected photos to your save location specified in TouchCopy options. The photos will be copied into a sub-folder called "Photos". By default the save location is a folder called "iPod Content" on your Desktop.
Select one photo to copy to your Desktop - click the "Desktop background..." button on the Photo tool bar. TouchCopy will ask you how you would like to size the picture to your desktop. Make a selection and then click "OK".