What portal add-ons are these three sites using?

[syqhcc]

I'm thinking of building a news site using Xenforo, and I stumbled across these three sites by accident, and I'm wondering what attachments they use? It doesn't look like (XF2 [8WR] XenPorta 2 (Portal) PRO), if it's a custom add-ons, why is it so similar? Checking by wappalyzer is not wordpress either.

PC Gamer ​

PC Gamer is your source for exclusive reviews, demos, updates and news on all your favorite PC gaming franchises.

www.pcgamer.com

Space.com: NASA, Space Exploration and Astronomy News ​

Get the latest space exploration, innovation and astronomy news. Space.com celebrates humanity's ongoing expansion across the final frontier.

www.space.com

Live Science: The Most Interesting Articles, Mysteries & Discoveries ​

Live Science features groundbreaking developments in science, space, technology, health, the environment, our culture and history.

www.livescience.com

Thanks in advance!


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