Is there a free program that i can download that is similar to Microsoft Visio?

Answer 1

You can do almost everything that Visio does using the Draw feature in MS Word (or PowerPoint) - just a little more time consuming.

If you are asking because you want to know what Visio does, then go into this website http://office.microsoft.com/en-ca/training/FX100565001033.aspx, Select Office 2003 and Select Visio for some amazing tutorials that work even if you don't have Visio (the only thing you can't do is the practice sessions).