That page requires some pretty decent CSS modifications.
For the columns, use this plugin: https://wordpress.org/plugins/lightweight-grid-columns/
You can add classes to each column so you can then apply specific CSS to separate them like on our add-ons page.
If you’re using Chrome or Firefox (with Firebug extension), you can “Inspect Element” and take the CSS from our site and add it to yours.
You’ll also be able to look at the HTML/CSS for the buttons etc..
Use those tools and see how far you get, then if you need more help come back here and I’ll give you some tips 🙂