You must use one of the blender export scripts to save the model in some file format that you can read, such as OBJ or LWO or some such.
Also, you are significantly disadvantaged to how the model is exported. You can export geometry, and sometimes texture mapping, but you cannot export armatures and the like. You would need to essentially re-rig the model in the new game engine.
So, you can, technically, export them, but it probably isn't worth the grief for anything but simple stuff.
Animating 3D models isn't an easy task. It takes a lot of effort and a large library to handle it.
Yes I know. What I just thought was, if there can be multiple free, open source operating systems (I'm not sure about this, but I think an OS should be a more challenging project than a 3D modeling program) why shouldn't it be the same for 3D modeling?
But anyway, you proved me wrong, since Wing3D is free and open-source.