After you've shot a photo, it's important to bring it into a program such as Photoshop, Lightroom or Aperture. From there, you can beautify your photographs, setting a mood and highlighting subjects.
There are freeware programs out there such as Gimp. Some more programs can be found here
Links to tips and techniques on digital post processing:Exposure Guide
- The part of Exposure Guide has some great image editing techniques.The Photo Argus
- A helpful collection of digital post processing tutorials. Photo.net
- A good little website for post processing techniques.
If you have any other sources you would like to add to this which other members may find helpful, comment below and they will be added!