Professional societies:

Society of Exploration Geophysicists

Australian Society of Exploration Geophysicists

Directory of Australian Geoscientists

Canadian Society of Exploration Geophysicists

Government departments:

PIRSA

University research consortia:

UBC Geophysical Inversion Facility

Doug Oldenburg's team at UBC specializes in inversion of potential fields, electrical and electromagnetic data. There are some nice case histories on this site.

Consortium for Electromagnetic Modeling and Inversion

Geophysical contractors:

Zonge Engineering

World Geoscience Corporation

GPX Geophysical Exploration Services

Image processing:

Geoimage

Geophysical Imaging Services

Pitt Research

Software:

ENCOM

Geological and geophysical exploration software, including potential fields and EM modeling. ENCOM also supplies the Discover add-on for MapInfo.

VIEWLOG Systems

Dirk Kassenaar's VIEWLOG program is one of the most popular geophysical log analysis programs on the market.

Geosoft

Mapping and data processing software for geophysics, geochemistry and drill-hole information.

Interpex

Forward and inverse modeling software for nearly every geophysical technique known to mankind.

Geotools Corporation

Makers of the well-known MT/AMT/CSAMT interpretation software. Geotools now markets gravity processing and interpretation software.

MTNet source codes

Free MT processing, forward and inverse modeling software for academic use. Amongst other things, you will find a link to Constable's Occam smooth 1D and 2D inversion codes. These codes are "academic grade", but work well if you have the patience to experiment a little.

A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994

by Viki Bankey and Walter L. Anderson
USGS Open-File Report 95-77

Training:

Learning-Curve EXPLORE