With the Joomla! component TweetScheduler, you can schedule tweets ahead within your own Joomla! backend. After setting up a cronjob and API-accounts, you can just start a new campaign - setup all messages - and TweetScheduler does the rest. An essential tool when using tweets on a daily basis - and already used over 190 sites!
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It's great! I tweet jazz musicians birthdays, and I love TweetScheduler! Thanks a lot for a great extension! Keep up the good work.