Computer Information Systems
This search engine covers articles from many different topics, with a focus on scientific literature.
This search engine can help you "home in on key publications, citation, and results..." on your topic. Once you hone in an article, there are automatic recommendations to other related citations, sorted by influence. It is mostly focused on computer science and neuroscience topics.
An open access repository for research data, including journal articles, datasets, and software. Currently contains mostly scientific research data, but open to all subjects. Affiliated with CERN and OpenAIRE.