New search engines

An article in O Globo yesterday (http://oglobo.globo.com/tecnologia/) discussed new search engines (other than Google). Here's a summary of the article so you can test the new tools:

- Bing http://www.bing.com/ - The new Microsoft search engine. Strength: no need to browse the links one by one, returning to the results everytime. Next to each result you can preview the page before visiting it. Same works for images and videos, which start playing as you move the cursor over the results. You need to choose United States (top right) to be able to use the complete version.
- Wolfram Alpha http://www.wolframalpha.com/ - Uses a 'superplataform' called Mathematica. It's an answer engine. The less you write, the more information you get. If you type in the name of a city, for example, it will return lots of information about the city.
- Powerset http://www.powerset.com/ - Also an answer engine, it answers complete questions, such as 'Where is Klagenfurt?'
- Viewzi http://www.viewzi.com/ - A different way to preview results with Flash.
- Leapfish http://www.leapfish.com/ - Results from Google, Yahoo! and Microsoft, simple interface.
- Vadlor http://www.vadlo.com/ - Specializes in biomedical and life sciences
- Blackle http://www.blackle.com/ - Specializes in ecology - and is ecological: the background is black to save your monitor's energy.

I have yet to test them, and will follow up with my experiences. You can also let us know what you think about them by posting a comment.

(source: O Globo Digital, 08 July 2009 - "À procura da melhor resposta" - André Machado)