Are there any promising search algorithms/crawlers out there? Obviously one of Google's advantage is the size of their index, but I would like (and probably pa

Are there any promising search algorithms/crawlers out there? Obviously one of Google's advantage is the size of their index, but I would like (and probably pay) for a search engine that was as good as Google used to be, but only indexed a small portion of the internet that interests me. Maybe a business model of accepting payment to index certain domains could work.