There's a kind of magic about "top" lists. For one, they give you a humble look inside of the author's mind, a taste of what he or she values and holds as tent poles of the subject matter at hand. For two, I just like Top 5 lists.
A confession -- this is my first "top" list. I've never had to choose 5 things and put them into a list format. So, while my banana bread bakes, I will attempt to whittle down my favorite addons into a convenient list and describe the aspects of what makes each of these addons great, from their purpose to their execution. So, here we go -- my top 5 addons.