Atheists are those who do not believe in God or any other spiritual beings.  Some atheists deny that God exists at all.

There is more than one type of atheist, some having greater doubts about the existence of God than others.  An agnostic is a person who doubts the existence of God, but is not absolutely sure that God doesn’t exist either.  Agnostics generally believe that the existence or otherwise of God can never be proven one way or the other.

A weak atheist believes that God does not exist.  They state that there is no evidence to suggest that God exists, or at least that what evidence is put forward is not strong enough.

A strong atheist would argue that the whole subject is pointless altogether.

Atheists are not necessarily people without any morals as we know them.  Atheists often have the same set of moral standards as others in society, but don’t derive their moral code from the belief in God.