Themes with Categories as Pages

Hi – I’m new to the forum. I’m trying to bring all my blogs into one place, but they’re all focusing around different topics. I’m organizing them by Category but then I would like the viewer to click on the page headers, get a brief description of the page at the top, followed by every post related to that category.

Someone mentioned that only certain themes do this. Anyone have a list of said themes, or an easy way to find them? Thanks.
~Newbie