IconDeveloper is a program that makes it a snap to create your own icons for Windows. Most icon editors come with their own graphics editor. IconDeveloper doesn't. Instead, it assumes that most people who want to create icons are either going to create them using an existing graphics package like Photoshop, MS Paint, CorelDraw, or they take existing images (.BMP, .PNG, .JPG) and turn those into icons.
So instead of putting effort into a bitmap editor, IconDeveloper focuses itself on making it really, really easy to turn existing images into Windows icons and allowing for common modification of those icons (resizing, color changing). The result is a program that makes icons extremely fast, extremely well and extremely easily.