Natural Earth is a public domain map dataset. Featuring tightly integrated vector and raster data, with Natural Earth one can make a variety of visually pleasing, well-crafted maps with cartography or GIS software. Natural Earth was built through a collaboration of many volunteers and is supported by NACIS (North American Cartographic Information Society), and is free for use in any

Datasets

Natural Earth cultural and physical data - version 1.4, August 2011SHP
Natural Earth I world cover with shaded relief, water, and drainages - version 1.3, January 2011GeoTIFF