BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 120 million documents from more than 6,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
Creative Commons is a global nonprofit organization that enables sharing and reuse of creativity and knowledge through the provision of free legal tools.
EconBiz is a subject portal for economics and business studies.
*Library of Congress
The largest library in the world. So many resources available including; FREE posters, primary documents, subject-based resources, exhibitions, and MORE...
Microsoft Academic knows journal titles, conference names, and many research topics. Try these queries to understand the power of semantic search and unleash it yourself!
OER Commons is a public digital library of open educational resources. Explore, create, and collaborate with educators around the world to improve curriculum.
Our award-winning OER Professional Learning programs support instructors and curriculum specialists to gain the necessary skills required to find, adapt, and evaluate high quality open materials.
Semantic Scholar is a free, nonprofit, academic search engine from AI2.
We harvest Open Access content from over 50,000 publishers and repositories, and make it easy to find, track, and use.