What do you use for a product catalog?

What do you use for a product catalog?

I need to create a catalog of computer classes.  There are about 20 classes for 8 courses.  I need more than a list in a spreadsheet.  Each class has a description and a few images. I don't know whether to make this a Wiki document or a database or...  I don't even know the best forum to post this question in.

I am surprised to find that Zoho has no online store.

What have other people used to catalog products for visitors to their site?  I'd love to see some examples.

Thanks,
--DJ