How Do I Figure Out What Tool or Plugin Was Used, If Any?

Hello again. Newbie here …

On the link that I provided, there is a section (a little more than halfway down, right below the YouTube video) that says “Crewmember Roster”. This page was created before I started working on this site, so I’m unsure of how it was made. Clicking the “edit” link doesn’t provide me with any clues whatsoever.

Is there a way to figure out what plugin was used to create that grid with all the crew information tiled in the way that it is?

If not, would you recommend some free plugins that would allow me to:
1) create a tiled layout that’s similar to what is displayed (doesn’t need to be exact, but something close).
2) populate each tile with information (picture, name, etc) that is taken from each member’s profile/post/page? If you click on the profile, it directs you to the member’s full profile – I’d like to be able to autopopulate some of that info (not all, but just select bits).
3) be able to click the tile so that it goes to it’s corresponding profile page.

TIA!

The page I need help with: [log in to see the link]