GIMP

GIMP (GNU Image Manipulation Program) is an image editing program and a good Photoshop alternative. With GIMP you can edit images and create graphics. For editing photos GIMP comes up with a variety of tools, such as Cropping, blurring, smearing or postexposure. But even standard tools such as brush, eraser magnifier are not missing. Numerous filters help to significantly improve the quality of photos. GIMP supports almost all popular formats, including JPG, PNG, BMP, GIF, etc ..