There is a list of all the documented functions in the documentation. You can select a specific toolbox to limit the list to just what's in that toolbox.
I preferfdep over depfun, because a) it provides a lot more detailed information, including separating the files by toolbox if applicable, and b) I find depfun very buggy and unreliable (I get the same type of crashes you refer to, usually because depfun messed up and is trying to list every function and method associated with some random obscure class that is not actually called by my function but that shares a name with something in the dependency tree).
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