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There isn't a list as such.

Most of it is mentioned in the help manual: https://xenforo.com/help/manual/

There's also the HYS threads: https://xenforo.com/community/forums/have-you-seen/

But the best thing to do is to try the demo: https://xenforo.com/demo/

Note that the Media Gallery and Resource Manager add-ons are included in the demo.