BASE is one of the world's largest search engines for academic web resources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
CiteSeerX is a scientific literature digital library and search engine. It aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge.
Under the terms of the 2013 Federal Open Data Policy, newly-generated government data is required to be made available in open, machine-readable formats, while continuing to ensure privacy and security. This is the home of that data.
A digital library of Internet sites and other cultural artifacts in digital form. They provide free access to researchers, historians, scholars, the print disabled, and the general public with the mission of providing "Universal Access to All Knowledge."
Mednar is a free, medically-focused deep web search engine. Mednar search occurs in real-time, retrieving relevant medical information as if you were going to each individual website yourself. Because Mednar is a publicly available search, it can't retrieve results from your subscription or premium medical resources.