GNU Image Manipulation Program 3.0.0-RC1
GIMP is a very versatile graphics editing software. It works on bitmap images, provides layered editing, a plethora of drawing and colorization tools, photo enhancing and retouching features and filters, programmatic effects, various extension and scripting capabilities, and itself provides a highly adaptable multi-window interface. It can open nearly any graphics format, or import Photoshop, PDF, Postscript, SVG and other vector formats even.