The Open Modeling Interface and Environment (OpenMI) defines a standardized way to exchange data between computational models that run simultaneously. OpenMI aims to enhance process interaction representation in integrated environmental modelling.
KartoMNT is a free software of height model digitalization.
This software allows you to create your own Digital Height Models (DHM) with a simple map. Then you'll be able to visualize DHMs with the KartoMNT 3D viewer.