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.
GIMP - GIMP is a multiplatform photo manipulation tool.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
TwistedBrush Pro Studio - A powerful and unique natural media painting program.
Artweaver - Artweaver is a simple Freeware program for creative painting, i.e.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.