Article Searcher Software

Hi, I want a software program/utility for Internet Marketers and beginners which will search for articles on all the article websites for specific article content the software should work in this way, * the user types in a topic of choice * the software will go out on the internet and search for all articles on all article websites * software should list the results in order of popularity, the results can also be filtered by uniqueness, total articles in each article website Please also check for me if I am allowed to use such software for searching for content thanks