Ad Limiter v3.2.0
Ad Limiter cleans up search results by showing only one ad per search result page. The one ad shown is selected based on SiteTruth business legitimacy ratings. Rating are also displayed for search results. Mouse over a rating icon, and a "dog tag" will appear, with business background information.
Ad Limiter works with Google, Bing, Yahoo, and DuckDuckGo. Google Maps, too.
You can set the number of ads you want to see on each search result page. (Yes, you can set it to zero.)