An open and comprehensive catalog of scholarly papers, authors, institutions, and more. Inspired by the ancient Library of Alexandria, OpenAlex is an index of hundreds of millions of interconnected entities across the global research system. We're 100% free and open source, and offer access via a web interface, API, and database snapshot.
The OAPEN Library contains freely accessible academic books, mainly in the area of humanities and social sciences. OAPEN works with publishers to build a quality controlled collection of open access books, and provides services for publishers, libraries and research funders in the areas of deposit, quality assurance, dissemination, and digital preservation.