I just tried Wicket 1.5.6 and Liferay 6.1.0 combination and that is not working out of the box, at least not for me.
https://cwiki.apache.org/WICKET/wicket-examples-as-portlets.html
says that examples.war should work without any problem, but for me it tells after deploy that
11:53:17,096 ERROR [render_portlet_jsp:154] java.lang.IllegalStateException: filter path was not configured at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:164) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:241) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:70) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)
and won't work. Do you know
a) solution to this error
b) which combination of these two works out of the box?