Faviconer - Faviconer.com, or favicon generator, is online tool for creating favicon.
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Online Image Converter - Online Image Converter converts your BMP, JPG, PNG, GIF or ICO files quickly and easily.
icon sushi - @icon sushi is icon converter that supports xp icons, vista icons, bmp, png, psd, exe and icl.
Ordinatore - Those who want to tidy up their Macs will surely love this application.
icoworks - .ico editor for Windows 8 and Windows RT