Craft brew in Dublin Other than the popular Porterhouse (http://www.porterhousebrewco.com/bars-dublin-temple.php), are there other pub that serves craft/microbrewery beer in Dublin, Ireland?

Other than the famous Guinness brewhouse, are there other microbrewery around Dublin?

Other than Guinness Stout, what other Guinness beer is a must-have? Are there any Dublin exclusive beer?
Try against the grain on wexford street got a good selection there