Blekko wants to be the best alternative search engine on the Web. How? By trimming down those spammy results with the use of slashtags. Blekko uses slashtags to narrow down your search field into categories, so if you wanted to find out the latest on Demi Lovato, you could type in Demi Lovato/gossip and presto! All you need to know just a slashtag away.