RealWorld Designer - Icon Editor has the advantage to allow you to edit your own icons. This way, you will be able to make your own icons out of images and even make some 3D samples of them. All you have to do for this is to play with the image equalizer, or by changing the camera's angle to get the little icon that you want. You can get up to 37 sample of icons in 3D!
Advantage
RealWorld Icon Editor has a feature that will allow you to convert with a batch mode as support, and this is a unique feature for such a software.
If you wish to do so, the software will allow you to make icons as big as 1x1 pixel until 256x256 pixels,and will include icons with various width and height dimensions.
Disadvantage
This application is a shareware version that expires after 30 days of use.
So far this application is available in English version only.