More meanderings and a really good find for the photographers among us.
Lightroom (Adobe) is a great piece of software for image improvement.
The article linked gives five alternatives which are free. I'm playing with two of them at the moment, and they are: RawTherapee and LightZone.
You can read about them on their sites. There are screen shots as well as help pages. Steep learning curves, but really good software.