For my digital editing I use Lightroom 5. It is an Adobe product designed for photo editing (unlike the more expensive Photoshop which is designed more for graphic design). I rarely do more than very mild adjustments. Even in strong adjustments, I probably don’t use more than 50% of Lightroom’s capabilities. I thought you might be interested in seeing some of what can be done with digital photos.
Photo as shot
The camera uses a 3 x 4 format which will not be best for every photo. I did not crop the final version of this photo, but infinite cropping can be done.
You can make your color photo a black and white picture with one click.
In black and white
Easily adjust the black and white tones.
Adjusted black and white
You can leave just some color in the picture.
You can also do vignetting in all sizes (which I personally think is over-the-top for this picture).