The only one I am aware of personally is donkey calf raises:
Donkey Calf Instructions
Place toes and balls of feet on raised platform with arches and heels extending off. With arms on supports, bend over at hips with torso parallel to floor. Straighten knees, and have your training partner sit on your lower back, then raise heels as high as possible and lower. Repeat.
Whatever exercise is being performed here seems all new to me?
And there is a whole range of photos on girlsgotlegs where, to be frank, I also don’t recognize any of the exercises that the two girls are doing together?