There are a vast number of resources on the web for Computational Intelligence. I recommend looking around yourself a bit for your particular needs but below are a few links of general interest.
I installed version 14. After untarring, go inside the created ecj directory and type:
java ec.Evolve -file ec/app/ant/ant.params
More examples are described in the docs directory. Note that there appears to be an error in the suggested command lines. You must add ec/ in front of the particular file you wish to run (as I have for the Ant problem above).
If you look down their page a bit there are lots of great links.
search at Sourceforge for neural network code
Lots of examples
Lots of articles with a sprinkling of code. (Click on ‘Articles’).