geotranz
GEOgraphic coordinates TRANslator
GEOTRANZ (Geographic Translator) is an application program which allows you to easily convert geographic coordinates among a wide variety of coordinate systems, map projections, and datums. Currently, twenty-five different coordinate systems, map projections, grids, and coding schemes, and over two hundred different datums, are supported.
The user interface of GEOTRANZ is similar to that of a calculator, but can also be used to efficiently convert large numbers of coordinates contained in text files.
GEOTRANZ is the Debian name of GEOTRANS, a product of the National Geospatial-Intelligence Agency (NGA) and U.S. Army Engineering Research and Development Center.