Four groundwater modeling programs are available from this site. Trial versions of the software are downloadable for free. The programs are MicroFEM, for multiple-aquifer steady-state and transient groundwater flow modeling; MLU for drawdown calculations and inverse modeling of transient well flow in layered aquifer systems; SchlumBG for the automatic interpretation of geo-electrical measurements; and FlowNet for modeling of two-dimensional steady-state flow in a heterogeneous, anisotropic aquifer.