Kalypso is an open source application for geospatial modelling and simulation. It is primarily developed to be a user friendly tool for GIS-based modelling and simulation of hydrological and hydraulic numerical models.
Two dimensional (2D) fine mesh finiteelement (FE) grid editing system. Includes constrained Delaunay triangulation, and automated grid resolution changes based on local attributes. Win32 and Motif GUIs. Mature application, now going open source.