Friends of mine downloaded a shell programme called "Mambo" (I forget the name of it's bigger sister).
I think you might be talking about Joomla - not sure if I can post the link here, so google it
I can recommend it; nice, simple, easy to use interface. There are plenty of free themes on the internet that you can use, and you will be up and running in no time with a simple site. However, make sure you read the quick start guide, or the manuals, as you could become quite stuck - you need to know the structure of how everything works in Joomla in order to create a site easily. There is also a large amount of tutorials and guides on the internet if you get stuck at all.
Best of luck with your site!
