GIMP - GIMP is a multiplatform photo manipulation tool.
Faviconer - Faviconer.com, or favicon generator, is online tool for creating favicon.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
ConvertIcon! - Converticon is a simple icon utility.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Ordinatore - Those who want to tidy up their Macs will surely love this application.