I've found some flash animations for the Solar Analemma where I could change parameters such as latitude of observer, and I could see the resulting effect on a 3D image. This is it: http://astro.unl.edu/classaction/animations/coordsmotion/sunmotions.html
But I want more. I also need to be able to change Earth's eccentricity and/or axial tilt and see the corresponding effect on the shape and size of the analemma.
Where can I find something that does this?