Custom Wordpress Q&A Plugin with Categories

Need a custom wordpress plugin made like this: [login to view URL] 1) Must be able to easily create categories, and all new categories made will be automatically sorted by A-Z on any page I desire to be displayed to 2) Once I create a category, I can then add a Question & Answer's in that category, and it will be displayed like this: [login to view URL] 3) In the "create new question" page, all I do is type in a question, and then type in an answer to the question and then select the category I want to assign it too, I should be able to add multiple question's and answer's to each category and it must look and appeal as nice as the example shown in #2 (I should not have to worry about any html formatting or color changing, should automatically be added to the category of choice)