This module provides a sample portlet illustrating the various capabilities exposed by the spring-liferay-integration module.
It doesn't really do much on its own (ie you wouldn't want to run this for any reason other than to verify it works), but it is probably more interesting as a getting started guide. So go and check out the source.
Integration tests of the sample-portlet via webdriver/selenium.
A standard portlet archetype based on sample-portlet
An extended portlet archetype using spring and service-builder