You can find the full source code for this website in the Seam package in the directory /examples/wiki. It is licensed under the LGPL.
Get the JBoss Developer Studio with full Seam support in an Eclipse-based IDE.
And the Expand is a great tool for Seam. http://www.transtools.com/expand/en/what.html
Intellij IDEA 9 Ultimate has extensive Seam 2.x support. See here.
And the Expand is a great tool for Seam. http://www.transtools.com/expand/en/what.html
Intellij IDEA 9 Ultimate has extensive Seam 2.x support. See here.