dumbfind.com/ Acabo de verlo reseñado en los foros del navegador K-Meleon
kmeleon.sourceforge.net/forum/list.php?f=2. "Their idea is to combine traditional keywords with topics or categories. Before query results are served up to users, the search engine sorts its findings into related tag clusters to closely match the searcher's intent. When the search query is returned a list of tag clusters also appears." Una búsqueda:
dumbfind.com/search.jsp?search=ricardo+galli&tags=tarragona&x= 
