Social networking platform, not unlike Facebook, that works with other Google services and allows users to connect with and see what friends are doing. Users can create posts and share links or multimedia items with select groups (called Circles). The Hangouts feature allows group video chat.

CiteULike is a free service to help you to store, organise and share the scholarly papers you are reading. When you see a paper on the web that interests you, you can click one button and have it added to your personal library. CiteULike automatically extracts the citation details, so there's no need to type them in yourself. It all works from within your web browser so you can access it from any computer with an Internet connection. CiteULike supports annotation and rating of items, and upload of attachments (e.g. PDF file). (Attachments are only accessible privately by individual users). Bibliographic entries can be imported singly or in batches using BibTex or RIS formats.

Gnod is a cultural search tool that generates its results in floating tag clouds. You may search for books, music, movies, and people.

Social Science Research Network (SSRN) is devoted to the rapid, global dissemination of social science research. The SSRN electronic library consists of an abstract database containing abstracts on over 574,300 scholarly working papers and forthcoming papers, as well as an electronic paper collection with over 475,8000 downloadable, full-text PDF documents.

SSRN houses a number of specialized research networks in each of the social sciences, encouraging early distribution of research results, as well as direct communication between readers, authors, and other subscribers. SSRN's specialized subject area networks include:

Accounting Research Network (ARN)

Cognitive Science Network (CSN)

Corporate Governance Network (CGN)

Economics Research Network (ERN)

Entrepreneurship Research & Policy Network (ERPN)

Financial Economics Network (FEN)

Health Economics Network (HEN)

Information Systems & eBusiness Network (ISN)

Innovation Research & Policy Network (IRPN)

International Business & Management Network (INTL)

Leadership Research Network (LRN)

Legal Scholarship Network (LSN)

Management Research Network (MRN)

Marketing Research Network (MKTG)

Negotiations Research Network (NEG)

Organizational Behavior Research Network (ORG)

Political Science Network (PSN)

Social Insurance Research Network (SIRN)

Sustainability Research & Policy Network (SRPN)

Classics Research Network (CRN)

Music Research & Composition Network (MRCN)

Philosophy Research Network (PRN)

Rhetoric & Communication Research Network (RCRN)

Ning is a social website that brings together people in various realms, including education, social service work, tools, and music.

H-Net is an international interdisciplinary organization of scholars and teachers dedicated to developing the enormous educational potential of the Web by providing curated lists and web sites publishing peer reviewed essays, multimedia materials, and discussion.

Cestagi is a collaborative platform that connects interdisciplinary communities. You can create a CV, share contributions, ask questions, learn about upcoming events, search employment opportunities, and track information.

BibApp allows you to promote your research, find collaborators on your own campus in your research area, in order to make research more accessible in general. BibApp identifies which publications should be placed on the Web for greater access, and can place publications directly into an institutional repository.

Academia.edu is a social platform that allows academics to share research papers, gray literature, reviews and other scholarly materials. The site provides user statistics on the number and geographic origin of profile and document views. Academic affiliation is displayed in a tree-like format, grouped by universities and departments.

myPeers is a scholars social network that allows you follow your peers' research, get notified when their papers are published, and have access to their published work. It was only available for mac users