Krita is a FREE and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry.
இங்க்ஸ்கேப்
Inkscape is an open-source vector graphics editor similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X.
ஜிம்ப்
GIMP is a cross-platform image editor.