A wheel of radius 1 rolling inside a wheel of radius 2 (102 Kb)

Phase diagram of a rigid pendulum with large or small initial angle (about 600Kb each)

A Morse theory view of a torus (source file)

The Riemann surface of the square root (543 Kb)

ePiX-1.0.0 comes with a script, flix, that uses ImageMagick's convert -- to create mng files from ePiX files.