Social Bookmarking websites, like Digg and Delicious, are free to use but do require you to create an account through which you can store and manage these links with relevant tags and categories.

The links you store on these websites are usually publicly displayed in chronological order (and/or by categories or tags) and in the case of Digg other users viewing your stored links can choose to ‘digg’ or vote for your content to give it a higher ranking.

All content items on CSIRO's website are automatically set up to link to the following websites:

• digg [external link]
  (to register http://digg.com/register/) [external link]

• delicious [external link]
  (to register https://secure.delicious.com/register) [external link]

• StumbleUpon [external link]
  (to register http://www.stumbleupon.com/sign_up.php) [external link]

• facebook [external link]

• Google [external link]
  (to register www.google.com/bookmarks/<http://www.google.com/bookmarks/) [external link]

• reddit [external link]
  (to register http://www.reddit.com/login) [external link]

You can also choose to email the content.

For more information check the Wikipedia entry on social bookmarking.

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