BMBF Research portal
Thethat has been created to search for scientific publications and research promotions.
Search specifically for scholarly literature, including peer-reviewed papers, theses, books, preprints, abstracts and technical reports from all broad areas of research and find articles from academic publishers, professional societies, preprint repositories and universities, as well as scholarly articles available across the web.
German search portal for life sciences. It is possible to search several free databases (including PubMed) with only one question.
BASE is the name of the multi-disciplinary search engine for scientifically relevant web resources which was created and developed by Bielefeld University Library.
WorldWideScience.org is the prototype for a global science gateway connecting you to national and international scientific databases.