CWM Global Search - Finding Chemical Information on the Internet. Search over more than 30 free online chemical/biological databases; use one interface.

Google Scholar  provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar helps you identify the most relevant research across the world of scholarly research.

Scirus is the most comprehensive science-specific search engine on the Internet. Driven by the latest search engine technology, Scirus searches over 485 million science-specific Web pages, enabling you to quickly: