The Carrot search engine returns search results divided into themes.  For example, I typed in “Roman Gladiator” and, in addition to getting a list of typical results from a search engine, I saw a listed of thematic categories.  These included “Ancient Rome,” “Movie Gladiator,” and “Collectible Swords.”

These themes, I think, will be helpful to English Language Learners as they try to get through all the “clutter” of search engine results.

I’ve placed the link on my English Themes For Beginners under Search Engines.