There are the Virtual Sundials I have made using Google SketchUp:

the La Nef de Tavel from the Midi of France

the Jersey Vertical Declining Dial,

the "Earthdial" from Germany

the "Cycloid Polar Dial" from Newport, Shropshire in England`

the "Declining Vertical Bifilar Dial " again from Newport, Shropshire

Others to come when I have the time!

Google has acquired the 3d modelling program, SketchUp, and it is now available free, to download at Google SketchUp web-site.

I have recently used Sketchup myself and you might find this interesting. as diallists. After all, it's free.

you can use SketchUp to delineate the dialplates or you can import 2d plane dial designs, such as Shadows produces into Sketchup 3d models

you can add features from around your dial like buildings, landscape etc

you specify the latitude and longitude of the model's location, the day and time, the orientation of the dial, and the shadows of the gnomon are displayed automatically

you can produce jpeg images, like these on this page, avi movies and send model files to anyone who has SketchUp