Helpers targeted mainly for add-on projects, but which can be handy for generic Vaadin projects as well.
Provides e.g. searchable list and embedded server for UI's on the test packages, essential serious add-on projects. Also contains some helpers for TestBench/Selenium.
See archetypes configuring this add-on automatically for your add-on projects:
Also contains a component to dynamically adjust properties of components within given "component tree", but that is broken (pending some V6->V7 upgrade fixes).