Pixelitor - Pixelitor is a cross-platform raster graphics editor written in Java.
Img.vision - Image hosting & video hosting for eCommerce sellers
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.
UploadHouse - Thumbnail and resize your photos and images
RealWorld Photos - RealWorld Photos is an free portable photo editor for Windows.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.