More than 100 mio. scientfic documents from more than 5000 content providers. BASE is one of the world's most voluminous search engines especially for academic open access web resources.
The RSS search engine will help you discover the most popular feeds on the web around your favorite topics. You may find blogs, news websites, podcasts, Twitter accounts and more.
WorldWideScience.org is a global science gateway accelerating scientific discovery and progress through a multilateral partnership to enable federated searching of national and international scientific databases.
Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. Advantages in terms of availability, coverage, timeliness, and efficiency. Isaac Councill and C. Lee Giles.