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.
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
ConvertIcon! - Converticon is a simple icon utility.
IconLover - Icon editor for Windows.
Ordinatore - Those who want to tidy up their Macs will surely love this application.