Osun: Search Engine for Documents

Osun.org is a search engine that allows researchers to search for certain types of documents on their topic: pdf, doc and ppt. Among the treasures to be found are articles posted by scholars on their personal sites, conference papers and presentations. The drawbacks of using the site include the following: there is no results count, you can only search type one at a time, and the source of the document takes a few extra steps or might not be able to be determined. Still worth checking out.