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

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

A visual interface to the world’s scientific knowledge.

Semantic Scholar helps researchers find better academic publications faster

Google's mission is to organize the world's information and make it universally accessible and useful.

Public search engine and digital library for scientific and academic papers.

Papers helps you collect and curate your research material.

Aims to enable everyone to perform research.

Search Engine for Scientific Publications

Online rental service for scientific, technical and medical research.