ResearchGate is the professional network for scientists and researchers.

Search Engine for Scientific Publications

A free online service for academic social network analysis and mining.

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

Social Science Research Network

Commercial social networking website for academics.

OA repository for EU-funded data and publications.

An online marketplace for science experiments.

Tools and documentation for citizen science

ImpactStory is an open source, web-based tool that provides altmetrics.