Pennsylvania State University announced Tuesday that it's "Scientific Literature Digital Library and Search Engine," CiteSeerX has reached over 1 million articles and other scholarly works. Focusing on literature in computer and information science, CiteSeerX allows you to do more than just search the literature. Most articles are available in fulltext via PDF or PS format. In addition, CiteSeerX provides citation information for the articles available and allows citation searching. You can search for documents, authors, and even tables. Their Autonomous Citation Indexing facilitates finding the Most Cited documents, citations, and authors, as well as creating a Venue Impact Rating.