Social Bookmarking

  • CiteULike
    Search, organize, and share scholarly papers. - Scholarly Papers
  • Delicious
    One of the first social bookmarking sites.
  • Diigo
    Highlight, annotate, and share web pages with this unique knowledge-sharing tool.
  • Evernote
    Index and search text, images, and media clipped from local documents and the Web.
  • Reddit
    Social bookmarking site with numerous subtopics.
  • Stumble Upon
    Web site bookmarking and social discovery service.
  • Zotero
    Firefox extension for collecting, managing, and citing resources.