social bookmarking

Brainify

Academic social bookmarking and networking for college students.

www.brainify.com

CiteULike

Search, organize, and share scholarly papers.

www.citeulike.org - Scholarly Papers

Clipmarks

Social learning tool. Clip and share interesting text, images, and video.

www.clipmarks.com

Connotea

Online reference management for researchers, clinicians, and scientists.

www.connotea.org - Scholarly Papers

Delicious

Leading social bookmarking site and search engine.

www.delicious.com

Diigo

Highlight, annotate, and share web pages with this unique knowledge-sharing tool.

www.diigo.com

Digg

Community-driven social news/bookmarking site.

www.digg.com

Evernote

Index and search text, images, and media clipped from local documents and the Web.

www.evernote.com

Ma.gnolia

Discover, share, and discuss the best of the web at Magnolia.

ma.gnolia.com

Reddit

Simple bookmarking site with numerous moderated subtopics.

www.reddit.com

Stumble Upon

Web site bookmarking and social discovery service.

www.stumbleupon.com

Zotero

Firefox extension for collecting, managing, and citing resources.