I need help finding Mac software!!!

I got a simple computer on Ebay for just internet and email for my 2nd office. I got one of those old Imacs (purple one) with a DVD slot in front. Do you know where I can download a version of Internet Explorer and also an email application to use on that computer. I would say it was made by Apple back in about 2000 or 2001. It's the Imac model with everyhting built into the monitor.

I need a browser, email appl, quick time, etc. Where is a good site with all early versions of Mac software for older computers?

This computer does not use Mac OSX.