Here we present the WIB application (forWikipedia Integrated Browser) that allows browsing Wikipedia documents. Depending on the type (s) of item (s) considered as input or output (terms, documents or categories), the task resolved by the application varies (information retrieval, query extension, keywords extraction, automatic classification, ...) but the question is always to cope with the selection of the relevant items. This application is a way to experiment online with different models of relevance. This application is currently available on the web at the following url : http://echo.imag.fr/apps/echopedia/.