Some time back I had written a post on Scroogle. Scroogle is good, it provides privacy. But if you want more for your browsing experience, something that you thought was always missing in a lot of search engines, then there’s a better search engine and it is DuckDuckGo.
The very first reason that you may want to use this search engine is that it does not bubble you and neither it tracks you.
Xoost is a community search engine. From Xoost page:
Imagine you are searching for a topic related to your favourite Music, Travel destinations, Events. With Xoost you will benefit from the exponential value of doing it much more productively together with your friends or family members. It’s all about sharing Search skills & Knowledge.
Xoost diaplays result from Google, Yahoo and Bing all in one page. If you like a page you can mark it or share it with others. So this is one good feature that is quite useful. Also there is a Search extension available for firefox for Xoost.