Alien Skin Software
Some people, who claim to be photographers, still say that there is no need for post processing if you have a skill to create a good photograph from the very beginning. In our digital era, I'll say there is always a way to make your photograph look better even if it is a good shot and you are happy with it. Even a sudden change might help your image to get better dimension and feel. Here is an example of it.
For this image I used Alien Skin Exposure 6 - Kodak Ultra Color 100 UC