I feel these things should exist without God. That is, they can be helpful to non-believers too. But I am having a hard time creating secular versions of these.

I think the root of the problem lies in the fact that God here is an abstract entity with whom the believer communicates but no such abstract entity exists for non-believers (duh!).

May be some form of general artificial intelligence can fulfil this role in the future?

Real people can fulfil this role too but they are probably not abstract enough. edit: And hence not "powerful" enough (to forgive, to protect etc.).

Just spit-balling here. Also not trying to offend anyone here.