Found a nifty digital processing software called Snapseed. Really quite wonderful. I have loaded it on my iPhone, iPad and MAC. Had an image of these two girls walking away from me at a bday party. Used Snapseed to increase contrast and grunge up the background. Took all of five minutes.
I could have added frames, converted to black and white, added tilt shift affects and a whole load of other post processing options.
I quite like it.