Is there any sophisticated role-playing game framework available? [closed]

Question

I'm looking for a role-playing game framework which fulfills the following critera:

• Open source / Free for non-commercial
• Targeted language doesn't matter as long as it's not too obscure (C# or Java would be great)
• The framework doesn't have to provide any graphics, sounds or other "low level" stuff
• The framework should support complex, non-linear story lines (like Fallout 1/2/3)
• The character should be highly configurable (again like Fallout or Dragon Age)
• Support for a party would be nice

Answer 1

Check out GemRB, a port of the Infinity Engine (i.e. Baldur's Gate). It's licensed under the GPL and written in C++ and Python if I'm not mistaken. Since it's based on the Infinity Engine, I would assume that all of the last three requirements apply as well.