I'm new to Mac and not sure about unzipping files. For example I have downloaded some icons and when I try to open them I see a bunch garble. I know Windows (sorry to cuss) has an unzip utility or you can use something like WinZip. What do you do on a Mac (with Leopard) to unzip files? And is a separate program even necessary? Thanks!
MacBook 2.2GHz Intel Core 2 Duo, 4GB memory, 120GB HD, iPod Touch 16GB v1.1.2, Mac OS X (10.5.1)