IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Faviconer - Faviconer.com, or favicon generator, is online tool for creating favicon.
Icon Slate - Icon Slate lets you easily compose, import and export desktop icons in many formats.
ConvertIcon! - Converticon is a simple icon utility.
Icono Maker - Icono Maker is an icon maker for Windows.
Ordinatore - Those who want to tidy up their Macs will surely love this application.