Mednar is a one-stop federated search engine designed for professional medical researchers to quickly access information from a multitude of credible sources. Researchers can take advantage of Mednar's many tools to narrow their searches, drill down into topics and discover new information sources. Federated search is a new way to comprehensively search multiple databases in real time. Instead of crawling and indexing static content like Google or many metasearch engines, Mednar queries select, high quality databases to search simultaneously. While this may take a few seconds longer, it ensures a superior level results.





Very interesting listing, too, of related applications (e.g., PubMed and NextBio and ScienceRoll) and others that are not search engines per se and many of which are new to me.
Neat site you have here.