AntiFavicon: An online tool which creates text favicons in different colors. [Italian and English].
Collabyrinth: A free, online icon editor by Andy Deck for producing favicons in the windows ICO format. Requires Java.
DeGraeve: Favicon Editor: An online favicon editor by Steven DeGraeve, which also offers the option to generate a favicon from an uploaded PNG image.
Dynamic Drive: FavIcon Generator: An online tool to create a favorites icon for a Website. Capable of generating desktop icons as well.
FavIcon from Pics: Generates favicon images for browser address bars, favorites and tabs, from pictures, logos and other graphics.
Favicon Generator: A free online tool which creates a favicon.ico from an uploaded image.
Favicon.co.uk: A free online favourites icon editor, which customizes the icon in a browser's address box and bookmarks.
Favicon.com: Online Java icon editor to create favicon.ico files that customize the marketing logo in favorites/bookmarks.
Graphics Guru: Favicon Generator: Free online tool that can create favicon (.ico) images.