C++
GDAL is an open source X/MIT licensed translator library for raster and vector geospatial data formats.

GDAL - Geospatial Data Abstraction Library

GDAL is an open source X/MIT licensed translator library for raster and vector geospatial data formats.

Main site: http://www.gdal.org - Developer and user docs, links to other resources
GIT repository: https://github.com/OSGeo/gdal
Bug tracker: https://github.com/OSGeo/gdal/issues
Download: http://download.osgeo.org/gdal
Wiki: http://trac.osgeo.org/gdal - Various user and developer contributed documentation and hints
Mailing list: http://lists.osgeo.org/mailman/listinfo/gdal-dev