I should subtitle this "Analyze Your Abilities Easily in Your Spare Time." That's what this addon does--it analyzes your abilities in a situational manner. Note that there is some setup involved.
http://wow.joystiq.com/2010/12/09/addon-spotlight-drdamage/
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The Solo MMO Player collects links to the most useful or interesting MMO websites, databases and blog entries I have found, with a bias toward topics of interest to the Solo Player. Use the search box in the upper left hand corner to find topics. Kelari NPC Warrior art courtesy of Game Fluid.