A unique search tool, helping you to find free academic articles and books

Baidu Scholar aims to become the biggest, most comprehensive research platform in China.

A service to help the academic community find academic content, researchers, and more.

Semantic Scholar helps researchers find better academic publications faster

Aggregator of open access research papers for researchers and repositories.

Access to major journals in the biomedical and related social sciences fields.

Online rental service for scientific, technical and medical research.

Article recommendation and literature discovery service in biology and medicine.

A global science search engine designed to accelerate scientific discovery and progress by the sharing of scientific knowledge.

ScienceOpen explores new ways to open up information for the scholarly community.