Silk. Inkscape. Gimpshop | The Free Photoshop Alternative. GIMP. PostworkShop. Picturenaut. Picturenaut 3 with a completely redesigned interface. Pan anywhere with left mouse button, zoom with mouse wheel. Make better HDR images. You want the accuracy of HDRShop, with all the low-level control to squeeze out the maximum on image quality. But you you also want all the modern convenience features like exposure detection from EXIF data, image alignment and ghost removal?
And you want a tone mapper where the final result looks exactly like the preview? Picturenaut is for you. Picturenaut was born in the German photo community. Fast. Picturenaut's consistent multi-threaded architecture makes it the fastest tone mapper in the world. Photoreceptor on a 32 Megapixel pano in realtime. Sumopaint. Paint.NET. BeFunky.