A colleague at work has been working on a game engine in DirectX for quite some time now. As you can probably guess, it's called Cylix.
And guess what: I just got an exclusive tech demo. So, here it is available to everyone, test it, report any bugs you find, leave comments etc.. Note that this is still work in progress, there are no shaders etc..
Download Cylix tech demo v1 (Size: 1,97 MB)