Webduko is a niche website search engine. Which niche does it search? The answer is - everything. If your niche is "cats", search for "cats" and get the websites that is exclusively about cats. Wikipedia is not a cat website, so you won't see it in the results. Best for discovering competitors and relevant websites that don't turn up in Google/Yahoo search. Feedback most welcome. Webduko is located at webduko.com.