Parvati : the believers consider her as the divine God above all the other gods. In many interpretations of the scriptures, Parvati is also regarded as a representation of Durga, albeit the gentle aspect of that goddess. 

 Durga  is a form of  the supreme goddess.  Some religions say she is an incarnation of Lakshmi with the help of Saraswati and Parvati.

Durga is depicted as a warrior woman riding a lion  or a tiger with multiple hands carrying weapons and assuming  symbolic hand gestures. This form of the Goddess is the embodiment of feminine and creative energy .

Kali is sometimes presented in the West as dark and violent. Her earliest history as a figure of annihilation still has some influence. The comparatively recent devotional movement largely conceives of Kali as a straightforwardly benevolent mother-goddess. Therefore, as well her association with the deva (god) Shiva, Kali is associated with many goddesses among them - Durga.

http://en.wikipedia.org/wiki/Kali