From GISWiki

GDAL - Geospatial Data Abstraction Library

is a translator library for raster geospatial data formats that is released under an X/MIT style Open Source license. As a library, it presents a single abstract data model to the calling application for all supported formats. The related OGR library (which lives within the GDAL source tree) provides a similar capability for simple features vector data.

• http://www.gdal.org/ Homepage
• http://www.remotesensing.org/gdal/