If you work with images, ImageMagick can be the ideal solution that your were looking for, a program that is specialized in the treatment of bitmap images.
It's a complete work suite with which to create images or edit them in thousands of different ways with its tools: resize, crop, rotate, adjust the color, apply special effects, etc.
- Compatible with more than 100 different image formats: GIF, JPEG, JPEG-2000, PDF, PNG, SVG, TIFF, etc.
- Use it from the command line or choose one of the compatible interfaces that adapts best to you: G2F, MagickCore, MagickWand, ChMagick, etc.
- Convert between formats.
- Create animated GIF files from a sequence of images.
A complete image editing tool
ImageMagick is a secure bet if you want to work with all kinds of images. It isn't a product for beginners, it requires certain knowledge to use and handle it. In any case, the results it offers are spectacular and the possibilities that it provides are unique.