I second that Krysztof's opinion.... I have been using ECJ to test / devlop new
EC methods and have found it highly extensible and hackable - generally ease of
use comes at the cost of versatility (which is imperitive to research).
However I would be interested in a public packages repository in which people
could deposit new & recently published evolutionary methods with descriptions
and examples (such as alternate structures, parent selection strategies
just my 2c,