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: * [Archetype for plain servers side and/or JS components](https://github.com/viritin/archetype-vaadin-addon) * [Archetype for traditional GWT components](https://github.com/viritin/archetype-vaadin-gwt-addon) Also contains a component to dynamically adjust properties of components within given "component tree", but that is broken (pending some V6->V7 upgrade fixes).