Beyond The Forge by KaKaRoTo

This extension allows you to integrate D&D Beyond's marketplace, its source adventures with The Forge's Bazaar.
This allows Forge users to import adventures and rule books into their Foundry games hosted on The Forge.

Check out the Forge for more details : https://forge-vtt.com/bazaar#type=dndbeyond

You can see it in action here : https://www.youtube.com/watch?v=wjOI_yi1KaA
And you can read more about it in our documentation page : https://forums.forge-vtt.com/t/d-d-beyond-integration/13331