If you do a quick Google search for, “without a plugin”, you’ll find a gazillion results for how to accomplish simple to complex tasks for WordPress without the need of a plugin.
With so many articles about not using WordPress plugins, it just begs the question: “What’s wrong with WordPress plugins in the first place?”
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More at: http://weblogtoolscollection.com/archives/2010/02/13/how-to-do-xyz-without-a-wordpress-plugin/