Wikipedia
Blekko
Blekko, trademarked as blekko (lowercase), was a company that provided a web search engine with the stated goal of providing better search results than those offered by Google Search, with results gathered from a set of 3 billion trusted webpages and excluding such sites as content farms. The company's site, launched to the public on November 1, 2010, used slashtags to provide results for common searches. Blekko also offered a downloadable search bar. It was acquired by IBM in March 2015.