Tara is a female Buddha that comes in many forms, most common white or green. White Tara represents compassion, long life, healing and serenity, while Green Tara is enlightened activity that removes obstacles, fears and worries. All in all there are 21 emanations. As John Blofeld points out, the Chinese Kuan Yin is not a female version of the male Avalokiteshvara but rather a Chinese version of the Tibetan Tara figure.
21 emanations of Tara above.
This Russian video about Tara certainly pulls out all the stops.