There are a multitude of Dieties in hinduism but the main three are Brahman (the creator), Shiva (the destroyer) and Vishnu (the preserver, he also takes the form of krishna).
In Hinduism it is believed that there is only one God that takes many different forms. There are over hundreds if thousands of forms, some of the most popular being Bramha, Vishnu, Shiva, Rama,...