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

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

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

Collaboratively in the high-energy physics community to convert journals to OA.

An easy and intuitive way to discover, read, annotate, write and share scientific research.

Scientific platform to research and curate the entire corpus of phenomenology.

Online rental service for scientific, technical and medical research.

Mendeley is a desktop and web program produced by Elsevier for managing and sharing research papers, discovering research data and collaborating online.

A research journal, composed entirely of "brief ideas".

An open citations index for scientific publications.