Back in the day (late 90s) there was a company called Copernic that had a good search engine with a REALLY good desktop client. I remember being able to do all sort of filters, sorting and crazy searches. IIRC It was paid, and it was really way ahead of the simple search operations you can even currently do with Google (actually, Google has constantly removed search abilities as time goes by, like for example, anyone remember when Google Search could show tweeter search results? or that you could "block" domains from search results)