I have been thinking for some time if there were any. Alternatives from two-three years ago did not seem to be any good but the situation might have changed now. After some superficial searching and a couple of articles I found these:
Wolfram
Not an alternative but more of a different way of searching.
Cuil
Not sure about this one, the results seem to be rather poor.
Hakia
Next generation semantic search? Results seem to be OK.
Clusty
I really liked this one, it groups all the results.
Exalead
Seems to have a very precise search syntax but I don't know anything about the results.
I have not been using any of these, just made a list where to start from.
Does anybody have some tips on how to test if a search engine is doing an OK job or not? Any other engines I have missed?
Also, could you share your experiences about alternative searches if you have been using any?
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