ResearchGate and Academia.edu are social networking sites for researchers to share their work and discover other researchers' work.

Additional Resources:

• A Social Networking Site is not an Open Access Repository (University of California, Office of Scholarly Communication, University of California)
• Review of ResearchGate: Pros and Cons and Recommendations (Jill Evans, Open Research Exeter)
• What are the Pros and Cons of Uploading Your Academic Papers to Academia.edu (Quora)