Special A was a good one that I watched. I'm not sure if YouTube has all episodes English dub but you can watch it on http://www.animefreak.tv/watch/special-english-dubbed-online-free. It's where I watched it.
Ouran, Nana, Honey & Clover, Clannad, Kanon, Ultra Maniac, Princess Tutu, Welcome to the NHK, Supah Gals!, Place Promised in Our Early Days, Five Centimeters Per Second, Voices of a Distant Star, Summer Wars