Is there any open-source software that is trying to implement and emulate the human brain (e.g. intelligence and feelings)?
We don't know enough about how the brain works to attempt to do what you're saying in a principled way. (I.e., anything of the sort is "guessing wildly".) So this isn't really a software question--if we had any idea of what to write, perhaps it would be, but right now we don't.
However, you may be interested in the Blue Brain Project for a more biological approach, or in any of a number of machine learning projects like the DARPA Autonomous Vehicle Grand Challenge. A less useful but more conversational approach might be found in ALICE, but I wouldn't recommend that for anything useful.