What are some animals that do not require a lot of sleep?

Generally speaking, humans need to sleep eight to ten hours per twenty-four hour cycle which, if you think about it, is a huge amount of time. I know that snakes don’t “sleep” strictly speaking but they still have to go into a deep, restful state.

So, are there any animals that do not require a lot of sleep? Do you know if humans are abnormal in that we need to sleep about a third of our lives in order to function well?