IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Ordinatore - Those who want to tidy up their Macs will surely love this application.
IconLover - Icon editor for Windows.
ConvertIcon! - Converticon is a simple icon utility.
RealWorld Icon Editor - Create Windows icons and Mac OS icons from images and 3D models in an integrated icon maker.
GenFavicon - Generator Favicon.