Katherine, you can’t figure out which part? Most of the page is a handful of various heading levels with unordered lists in simple HTML. If you’re referring to the icons in front of the headings, those are using the Better Font Awesome plugin.
You can find lots of other examples of Now pages at the Now project. The general idea is pretty basic, but there are obviously lots of ways to get creative with them. Mine may be one of the longer and more comprehensive versions I’ve seen, but I actively track a lot of the relevant data on my website, so it’s pretty easy to compile it into my longer list that I update every couple of weeks. Most of the examples I’ve seen are far shorter and simpler.