Ultima 7: Exult Rotate
I covered this fascinating mod for the latest release of Exult 1.4.9 a while ago. The basic premise of it is that it rotates the field of view 45 degrees clockwise about a vertical axis, giving the game a more classically isometric feel (that might also increase its appeal to Ultima Online veterans). It actually makes Ultima 7 look absolutely phenomenal, I think; I vastly prefer the rotated view to the classic view.
Though still very much in a proof-of-concept state, developer cma opted to release both a standalone executable and a patch for Exult 1.4.9-rc1 so that those curious about the potential of the mod can get an early look thereat. The setup, however, is a bit convoluted. You can find instructions at the project’s thread on the Exult forums, or here at the new project entry I’ve set up for it on the Ultima 7 subdomain.