Buddhist art frequently depicts Buddhas, Bodhisattvas, and other deities with their hands forming a number of different ritualised and stylised gestures (Mudras). They may be holding different objects as well within these gestures. Each by itself and in combination with others have specific meanings. Some of the more common ones are depicted below.
One of these gestures in particular should be familiar to hard rock fans. If you think hand gestures have no place within Christianity however, think again. There is actually an extensive history of ritual hand gestures within Christian art. Here is just one example, by El Greco, of Christ offering a blessing:
Shiva is one of the most widely known and revered Hindu gods. In the Hindu mythology, Shiva is the Destroyer, working in concert with Brahma the Creator and Vishnu the Protector. Shiva has always fascinated his followers by his unique appearance: he has not two but three eyes, has ash smeared all over his body, has snakes coiled up around his head and arms, wears tiger and elephant skin, leads a wild life in the cremation grounds far removed from social pretences, and is known for his proverbial anger. Here is a visual guide to the symbols associated with Shiva.