Looking for free GIS data? Robin Wilson, a PhD student at the University of Southampton, has a frequently updated list of free GIS datasets that he has found in the course of his research and based on recommendations from other GIS users.
The list is broken down into broader categories covering Physical Geography, Human Geography, and individual countries. Within the Physical Geography category, links are available to free GIS data covering elevation, weather, land cover, hydrology, and natural disasters to name a few. The Human Geography organizes links to data covering administrative boundaries, population, war and crimes, and points of interests. The datasets in both of these categories are at the continental and global level.
GIS data covering smaller geographic extents are linked from the individual country sections.
The list continues to be updated as Wilson finds new resources. Visit: Free GIS Datasets.