Icon Generator - Icon Generator is a little application built on AIR that lets you generate a CS5 or Web 2.
Icon Converter by RedKetchup - Convert a PNG, JPEG, WEBP, HEIC, GIF, TIFF, BMP, or SVG image to the ICO format. Customize the icon background and rounded corners. Create a compatible Windows ICO file from an image.
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
png2ico.com - Fully featured free online PNG, JPG, TIF, BMP & GIF etc. to ICO converter from sohOpen.
Icono Maker - Icono Maker is an icon maker for Windows.
Online Favicon Generator & Gallery - Online favicon generator & creator provides to convert image GIF, JPEG, PNG and download in favicon.ico format 16x16 or 32x32 pixels or HTML code. This website also has a fantastic favicon gallery with download.