Twist serve is a real serve in tennis. They call it the American Twist.
Kick serve is another really common one though it isn't really that good and people only use it as a second serve as it's really easy to do.
Rising shot/super rising are pretty easy.
Snake shot - buggy whip shot as mentioned.
And I've seen a hakugei done in a match before though the bounce back wasn't that dramatic.
split step is pretty common. and the Scud serve is nothing compared to the fastest serves on the men's side.