Yafaray is the development version of the open source rendering suit Yafray. The code structure has been totally reviewed and it has gained many new features.
Some time ago I have written an experimental Qt GUI for it (yafaray-qt) which was already fully functional (allowing for loading XML scene and saving them to the image formats supported by Qt itself). Some weeks ago this interface became the official yafaray UI (even if using it as a blender plugin):
It is very basic for now, but it does its job already. There are plans for adding more stuff on it, but for now it will stay like that for awhile.
As soon as Mandriva Cooker reopens for development I’ll create a package for yafaray and make it available for testing. For those interested in trying it before that, here is the announcement.