There is a round about way, but it is tedious 1.Buy 100000 top domain lists from alexa 2. find out top 100 .info and .org but it costs a lot
A free alternative (not foolproof) is to use all the 3 mighty search engines and key in: For top .info sites (add in relevant keyword if need to) site:.info Code (markup): For top .org sites (add in relevant keyword if need to) site:.org Code (markup): The above will return relevant sites according to their importance. You can in turn compare these results across the search engines. Please read the assumption: Assumption Sites that ranked on top does not necessary attracts more traffic but if a site is top ten across all three search engines, then most probably it is the top dog of its niche. For reference purposes only.