PhysioDesigner is an open platform for supporting multilevel modeling of physiological systems in the field of integrated life-science and systems biology, including physiology, neuroscience and so on. Users can combine and build mathematical models of biological and physiological functions on PhysioDesigner. Users can also integrate morphometric data on a model, which is used, for example, to define a domain in which partial differential equations are solved.

PhysioDesigner 1.0beta has been released.
http://physiodesigner.org