Here is another list relating to the best of 2012 or predicting useful tools for next year.

The SiteVisibility blog has created a list of  the top Free Twitter Tools for 2013.

Perhaps the most useful tool in the list from a journalist's point of view is Tweriod, which tells you the times of the day when the greatest number of your Twitter contacts are online.

For more on social media optimisation – or SMO – see this guide (published last year).

If you have a tip you would like to submit to us at Journalism.co.uk email us using this link.

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