Spent some time this morning researching a new 3D dashboard for an upcoming project and happened upon a new 3D Engine by Masayuki Kido called Sharikura 3D.  I have included a link to some of the demo apps here.  I've been a long follower of 3D engines like Papervision3D, Sandy 3D, and Away3D and to date Sharikura 3D has some of the nicest smoothing, and interaction that I've seen.  Check this guy out.  Sharikura 3D is incredibly fast, and even with my single-core 2GB non-video-card machine, I had no clipping or decrease in frame rate.  Keep your eyes on this guy! There is also a Roxik Physics Engine demo located at the same url.  Click drag, and throw the boot with and without gravity.  Very well done.  Im dying to see the source of this opened.