Offers both "Smooth" modeling (many thin layers) and "Occam" inversion styles to match synthetic curves to field data. Pricing and Licensing Tiers
While there is no permanent full version of IX1D available for free, you can access a functional demo and trial version directly from the developer to test its geophysical modeling capabilities. ix1d software free download link
Includes support for Magnetotellurics (MT), Frequency-Domain EM (FEM), and Transient EM (TEM). Offers both "Smooth" modeling (many thin layers) and
The official and safest way to download IX1D is through the Interpex Download Page . Frequency-Domain EM (FEM)