Any online information sharing software?

Can you tell me about some software, which has the following features?
1. A group of people can chat (both text and voice)
2. They can use a shared whiteboard. The whiteboard should allow to draw texts and various shapes.
3. They can share files and folders.
4. One on one chat, file/folder sharing, whiteboard sharing should be possible.
5. Fast and easy to use.

Let me know the name of the software, its price and how to get it.
Thanks.