GDAL - Geospatial Data Abstraction Library

GDAL/OGR is a translator library for raster and vector geospatial data
formats that is released under an Open Source license. As a library, it
presents a single abstract data model to the calling application for all
supported formats.

Current translators provide read (and sometimes write) access to a variety
of formats including ESRI Shapefiles, S-57, SDTS, PostGIS, Oracle Spatial,
Mapinfo mid/mif and TAB, GeoTIFF, Erdas Imagine, ESRI .BIL, .aux labelled
raw, DTED, SDTS DEM, JPEG, PNG and Arc/Info Binary/ASCII Grid.

A full list of supported data formats is available on the official website.
 
WWW: http://www.gdal.org/