clipped from: web2.econsultant.com   

There are 1200+ Web 2.0 sites/services/links in 50+ categories. Pick a category.

  • Blogging Services (106 sites) : Sites that allow users to blog, add functionality to blogs etc
  • Bookmarking Services (54 sites) : Sites that allow storing, searching, sharing bookmarks, web snippets, browsing archive etc
  • Browsing Services (18 sites) : Web browsers, add-ons, plug-ins etc
  • Business Services (75 sites) : Services/software oriented towards businesses including advertising, hosting, etc
  • Calendar Services (21 sites) : Online calendar services including reminders, planners etc
  • Cataloging Services (26 sites) : Sites allowing users to list and share books, CDs, DVDs, movies etc
    • etc