SimilarSiteSearch is capable of doing search like: "find similar sites to yelp.com in French and must be in Paris", "find sites like amazon.com in UK that doesn't sell books but must sell electronics", and "find similar sites to alibaba.com not for China but for India".
The Next Web Search is devoted to all things search related and is edited by Charles S. Knight, former editor of the blog AltSearchEngines and publisher of over 4,000 posts about alternative search engines.
S. Brin, and L. Page. Proceedings of the seventh international conference on World Wide Web 7, page 107--117. Amsterdam, The Netherlands, The Netherlands, Elsevier Science Publishers B. V., (1998)