Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
RealWorld Paint - RealWorld Paint is an free portable image/photo/animation editor.
GIMP - GIMP is a multiplatform photo manipulation tool.
miniPaint - Online graphics editing tool use HTML5 technologies like Canvas, Offline support, Drag and Drop.
Photoline - PhotoLine: Bildbearbeitung, Layout, Vektoreditor, Bachkonverter und Webbildbearbeitung
JugiPaint - JugiPaint is a painting software with diverse tools for various types of illustration work.