This search engine isn't a Google killer, but it's one that will be gaining in popularity because of its specialized search feature. It's called Clusty because it clusters search results in meaningful groups. If you are doing a large search on a popular term, Clusty will try to put them in groups with commonality to save time.
Implications - Though there are quite a few staples in today's online world, smaller companies can attempt to fill the holes these big companies may regret to attend to instead of trying to replace them. Clusty is a perfect example, as it does not directly compete with Google, but offers an alternative with enhanced features.